Finding the Fourth Proportional to 102,066.35, 140,851.31 and 56,748.47

Step by Step Solution

1. Step 1: Write the proportion equation
   102,066.35 : 140,851.31 = 56,748.47 : x
2. Step 2: Convert to fraction form
   102,066.35/140,851.31 = 56,748.47/x
3. Step 3: Cross multiply
   102,066.35x = 140,851.31 × 56,748.47
4. Step 4: Simplify right side
   102,066.35x = 7,993,095,352.00
5. Step 5: Solve for x
   x = 7,993,095,352.00/102,066.35
6. Step 6: Final answer
   x = 78,312.74