Finding the Fourth Proportional to 233,107,569.45, 321,689,473.31 and 128,686,498.83

Step by Step Solution

1. Step 1: Write the proportion equation
   233,107,569.45 : 321,689,473.31 = 128,686,498.83 : x
2. Step 2: Convert to fraction form
   233,107,569.45/321,689,473.31 = 128,686,498.83/x
3. Step 3: Cross multiply
   233,107,569.45x = 321,689,473.31 × 128,686,498.83
4. Step 4: Simplify right side
   233,107,569.45x = 41,397,092,030,730,632
5. Step 5: Solve for x
   x = 41,397,092,030,730,632/233,107,569.45
6. Step 6: Final answer
   x = 177,587,935.60