Finding the Fourth Proportional to 102,019.02, 140,777.28 and 56,694.15

Step by Step Solution

1. Step 1: Write the proportion equation
   102,019.02 : 140,777.28 = 56,694.15 : x
2. Step 2: Convert to fraction form
   102,019.02/140,777.28 = 56,694.15/x
3. Step 3: Cross multiply
   102,019.02x = 140,777.28 × 56,694.15
4. Step 4: Simplify right side
   102,019.02x = 7,981,248,228.91
5. Step 5: Solve for x
   x = 7,981,248,228.91/102,019.02
6. Step 6: Final answer
   x = 78,232.94