Finding the Fourth Proportional to 128,131.74, 176,822.46 and 71,543.52

Step by Step Solution

1. Step 1: Write the proportion equation
   128,131.74 : 176,822.46 = 71,543.52 : x
2. Step 2: Convert to fraction form
   128,131.74/176,822.46 = 71,543.52/x
3. Step 3: Cross multiply
   128,131.74x = 176,822.46 × 71,543.52
4. Step 4: Simplify right side
   128,131.74x = 12,650,501,203.46
5. Step 5: Solve for x
   x = 12,650,501,203.46/128,131.74
6. Step 6: Final answer
   x = 98,730.43