Finding the Fourth Proportional to 76,513.25, 105,586.16 and 42,520.86

Step by Step Solution

1. Step 1: Write the proportion equation
   76,513.25 : 105,586.16 = 42,520.86 : x
2. Step 2: Convert to fraction form
   76,513.25/105,586.16 = 42,520.86/x
3. Step 3: Cross multiply
   76,513.25x = 105,586.16 × 42,520.86
4. Step 4: Simplify right side
   76,513.25x = 4,489,614,114.69
5. Step 5: Solve for x
   x = 4,489,614,114.69/76,513.25
6. Step 6: Final answer
   x = 58,677.60