Finding the Fourth Proportional to 78,451.62, 108,263.43 and 42,641.57

Step by Step Solution

1. Step 1: Write the proportion equation
   78,451.62 : 108,263.43 = 42,641.57 : x
2. Step 2: Convert to fraction form
   78,451.62/108,263.43 = 42,641.57/x
3. Step 3: Cross multiply
   78,451.62x = 108,263.43 × 42,641.57
4. Step 4: Simplify right side
   78,451.62x = 4,616,522,087.47
5. Step 5: Solve for x
   x = 4,616,522,087.47/78,451.62
6. Step 6: Final answer
   x = 58,845.47