Finding the Fourth Proportional to 78,452.79, 108,265.58 and 42,642.89

Step by Step Solution

1. Step 1: Write the proportion equation
   78,452.79 : 108,265.58 = 42,642.89 : x
2. Step 2: Convert to fraction form
   78,452.79/108,265.58 = 42,642.89/x
3. Step 3: Cross multiply
   78,452.79x = 108,265.58 × 42,642.89
4. Step 4: Simplify right side
   78,452.79x = 4,616,756,464.18
5. Step 5: Solve for x
   x = 4,616,756,464.18/78,452.79
6. Step 6: Final answer
   x = 58,847.58