Finding the Fourth Proportional to 78,385.48, 108,172.74 and 42,575.80

Step by Step Solution

1. Step 1: Write the proportion equation
   78,385.48 : 108,172.74 = 42,575.80 : x
2. Step 2: Convert to fraction form
   78,385.48/108,172.74 = 42,575.80/x
3. Step 3: Cross multiply
   78,385.48x = 108,172.74 × 42,575.80
4. Step 4: Simplify right side
   78,385.48x = 4,605,540,943.69
5. Step 5: Solve for x
   x = 4,605,540,943.69/78,385.48
6. Step 6: Final answer
   x = 58,755.03