Finding the Fourth Proportional to 105,522.10, 145,614.72 and 57,766.20

Step by Step Solution

1. Step 1: Write the proportion equation
   105,522.10 : 145,614.72 = 57,766.20 : x
2. Step 2: Convert to fraction form
   105,522.10/145,614.72 = 57,766.20/x
3. Step 3: Cross multiply
   105,522.10x = 145,614.72 × 57,766.20
4. Step 4: Simplify right side
   105,522.10x = 8,411,609,038.46
5. Step 5: Solve for x
   x = 8,411,609,038.46/105,522.10
6. Step 6: Final answer
   x = 79,714.19