Finding the Fourth Proportional to 78,280, 108,026.67 and 42,470.17

Step by Step Solution

1. Step 1: Write the proportion equation
   78,280 : 108,026.67 = 42,470.17 : x
2. Step 2: Convert to fraction form
   78,280/108,026.67 = 42,470.17/x
3. Step 3: Cross multiply
   78,280x = 108,026.67 × 42,470.17
4. Step 4: Simplify right side
   78,280x = 4,587,911,039.43
5. Step 5: Solve for x
   x = 4,587,911,039.43/78,280
6. Step 6: Final answer
   x = 58,608.98