Finding the Fourth Proportional to 102,145.32, 140,957.97 and 59,118.87

Step by Step Solution

1. Step 1: Write the proportion equation
   102,145.32 : 140,957.97 = 59,118.87 : x
2. Step 2: Convert to fraction form
   102,145.32/140,957.97 = 59,118.87/x
3. Step 3: Cross multiply
   102,145.32x = 140,957.97 × 59,118.87
4. Step 4: Simplify right side
   102,145.32x = 8,333,275,903.89
5. Step 5: Solve for x
   x = 8,333,275,903.89/102,145.32
6. Step 6: Final answer
   x = 81,582.55