Finding the Fourth Proportional to 102,020.14, 140,784.42 and 56,079.94

Step by Step Solution

1. Step 1: Write the proportion equation
   102,020.14 : 140,784.42 = 56,079.94 : x
2. Step 2: Convert to fraction form
   102,020.14/140,784.42 = 56,079.94/x
3. Step 3: Cross multiply
   102,020.14x = 140,784.42 × 56,079.94
4. Step 4: Simplify right side
   102,020.14x = 7,895,181,826.53
5. Step 5: Solve for x
   x = 7,895,181,826.53/102,020.14
6. Step 6: Final answer
   x = 77,388.46