Finding the Fourth Proportional to 102,061.31, 140,847.50 and 61,782.35

Step by Step Solution

1. Step 1: Write the proportion equation
   102,061.31 : 140,847.50 = 61,782.35 : x
2. Step 2: Convert to fraction form
   102,061.31/140,847.50 = 61,782.35/x
3. Step 3: Cross multiply
   102,061.31x = 140,847.50 × 61,782.35
4. Step 4: Simplify right side
   102,061.31x = 8,701,889,541.63
5. Step 5: Solve for x
   x = 8,701,889,541.63/102,061.31
6. Step 6: Final answer
   x = 85,261.39