Finding the Fourth Proportional to 72,034.80, 108,116.20 and 42,415.60

Step by Step Solution

1. Step 1: Write the proportion equation
   72,034.80 : 108,116.20 = 42,415.60 : x
2. Step 2: Convert to fraction form
   72,034.80/108,116.20 = 42,415.60/x
3. Step 3: Cross multiply
   72,034.80x = 108,116.20 × 42,415.60
4. Step 4: Simplify right side
   72,034.80x = 4,585,813,492.72
5. Step 5: Solve for x
   x = 4,585,813,492.72/72,034.80
6. Step 6: Final answer
   x = 63,661.08