Finding the Fourth Proportional to 78,452.62, 108,264.81 and 42,642.57

Step by Step Solution

1. Step 1: Write the proportion equation
   78,452.62 : 108,264.81 = 42,642.57 : x
2. Step 2: Convert to fraction form
   78,452.62/108,264.81 = 42,642.57/x
3. Step 3: Cross multiply
   78,452.62x = 108,264.81 × 42,642.57
4. Step 4: Simplify right side
   78,452.62x = 4,616,689,738.96
5. Step 5: Solve for x
   x = 4,616,689,738.96/78,452.62
6. Step 6: Final answer
   x = 58,846.85