Finding the Fourth Proportional to 78,638.85, 108,522.32 and 42,829.02

Step by Step Solution

1. Step 1: Write the proportion equation
   78,638.85 : 108,522.32 = 42,829.02 : x
2. Step 2: Convert to fraction form
   78,638.85/108,522.32 = 42,829.02/x
3. Step 3: Cross multiply
   78,638.85x = 108,522.32 × 42,829.02
4. Step 4: Simplify right side
   78,638.85x = 4,647,904,399.58
5. Step 5: Solve for x
   x = 4,647,904,399.58/78,638.85
6. Step 6: Final answer
   x = 59,104.43