Finding the Fourth Proportional to 128,150.02, 176,841.39 and 71,560.18

Step by Step Solution

1. Step 1: Write the proportion equation
   128,150.02 : 176,841.39 = 71,560.18 : x
2. Step 2: Convert to fraction form
   128,150.02/176,841.39 = 71,560.18/x
3. Step 3: Cross multiply
   128,150.02x = 176,841.39 × 71,560.18
4. Step 4: Simplify right side
   128,150.02x = 12,654,801,699.85
5. Step 5: Solve for x
   x = 12,654,801,699.85/128,150.02
6. Step 6: Final answer
   x = 98,749.90