Finding the Fourth Proportional to 21,185,443.28, 29,238,889.74 and 12,367,786.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,185,443.28 : 29,238,889.74 = 12,367,786.52 : x
2. Step 2: Convert to fraction form
   21,185,443.28/29,238,889.74 = 12,367,786.52/x
3. Step 3: Cross multiply
   21,185,443.28x = 29,238,889.74 × 12,367,786.52
4. Step 4: Simplify right side
   21,185,443.28x = 361,620,346,386,138.25
5. Step 5: Solve for x
   x = 361,620,346,386,138.25/21,185,443.28
6. Step 6: Final answer
   x = 17,069,283.92