Finding the Fourth Proportional to 233,078,502.31, 321,648,284.69 and 128,656,545.96

Step by Step Solution

1. Step 1: Write the proportion equation
   233,078,502.31 : 321,648,284.69 = 128,656,545.96 : x
2. Step 2: Convert to fraction form
   233,078,502.31/321,648,284.69 = 128,656,545.96/x
3. Step 3: Cross multiply
   233,078,502.31x = 321,648,284.69 × 128,656,545.96
4. Step 4: Simplify right side
   233,078,502.31x = 41,382,157,322,174,144
5. Step 5: Solve for x
   x = 41,382,157,322,174,144/233,078,502.31
6. Step 6: Final answer
   x = 177,546,006.65