Finding the Fourth Proportional to 233,078,587.56, 321,648,402.06 and 128,656,631.88

Step by Step Solution

1. Step 1: Write the proportion equation
   233,078,587.56 : 321,648,402.06 = 128,656,631.88 : x
2. Step 2: Convert to fraction form
   233,078,587.56/321,648,402.06 = 128,656,631.88/x
3. Step 3: Cross multiply
   233,078,587.56x = 321,648,402.06 × 128,656,631.88
4. Step 4: Simplify right side
   233,078,587.56x = 41,382,200,058,623,656
5. Step 5: Solve for x
   x = 41,382,200,058,623,656/233,078,587.56
6. Step 6: Final answer
   x = 177,546,125.07