Finding the Fourth Proportional to 236,444,901.72, 326,292,016.17 and 129,154,312.72

Step by Step Solution

1. Step 1: Write the proportion equation
   236,444,901.72 : 326,292,016.17 = 129,154,312.72 : x
2. Step 2: Convert to fraction form
   236,444,901.72/326,292,016.17 = 129,154,312.72/x
3. Step 3: Cross multiply
   236,444,901.72x = 326,292,016.17 × 129,154,312.72
4. Step 4: Simplify right side
   236,444,901.72x = 42,142,021,094,459,480
5. Step 5: Solve for x
   x = 42,142,021,094,459,480/236,444,901.72
6. Step 6: Final answer
   x = 178,231,887.38