Finding the Fourth Proportional to 78,457.48, 108,272.58 and 42,647.56

Step by Step Solution

1. Step 1: Write the proportion equation
   78,457.48 : 108,272.58 = 42,647.56 : x
2. Step 2: Convert to fraction form
   78,457.48/108,272.58 = 42,647.56/x
3. Step 3: Cross multiply
   78,457.48x = 108,272.58 × 42,647.56
4. Step 4: Simplify right side
   78,457.48x = 4,617,561,351.90
5. Step 5: Solve for x
   x = 4,617,561,351.90/78,457.48
6. Step 6: Final answer
   x = 58,854.32