Finding the Fourth Proportional to 102,137.76, 140,833.89 and 71,913.42

Step by Step Solution

1. Step 1: Write the proportion equation
   102,137.76 : 140,833.89 = 71,913.42 : x
2. Step 2: Convert to fraction form
   102,137.76/140,833.89 = 71,913.42/x
3. Step 3: Cross multiply
   102,137.76x = 140,833.89 × 71,913.42
4. Step 4: Simplify right side
   102,137.76x = 10,127,846,681.80
5. Step 5: Solve for x
   x = 10,127,846,681.80/102,137.76
6. Step 6: Final answer
   x = 99,158.69