Finding the Fourth Proportional to 13,109,498,434.96, 19,655,792,978.49 and 5,142,471,673.64

Step by Step Solution

1. Step 1: Write the proportion equation
   13,109,498,434.96 : 19,655,792,978.49 = 5,142,471,673.64 : x
2. Step 2: Convert to fraction form
   13,109,498,434.96/19,655,792,978.49 = 5,142,471,673.64/x
3. Step 3: Cross multiply
   13,109,498,434.96x = 19,655,792,978.49 × 5,142,471,673.64
4. Step 4: Simplify right side
   13,109,498,434.96x = 101,079,358,614,718,562,304
5. Step 5: Solve for x
   x = 101,079,358,614,718,562,304/13,109,498,434.96
6. Step 6: Final answer
   x = 7,710,390,989.88