Finding the Fourth Proportional to 102,063.25, 140,839.31 and 56,738.47

Step by Step Solution

1. Step 1: Write the proportion equation
   102,063.25 : 140,839.31 = 56,738.47 : x
2. Step 2: Convert to fraction form
   102,063.25/140,839.31 = 56,738.47/x
3. Step 3: Cross multiply
   102,063.25x = 140,839.31 × 56,738.47
4. Step 4: Simplify right side
   102,063.25x = 7,991,007,096.03
5. Step 5: Solve for x
   x = 7,991,007,096.03/102,063.25
6. Step 6: Final answer
   x = 78,294.66