Finding the Fourth Proportional to 78,515.18, 108,345.60 and 42,704.42

Step by Step Solution

1. Step 1: Write the proportion equation
   78,515.18 : 108,345.60 = 42,704.42 : x
2. Step 2: Convert to fraction form
   78,515.18/108,345.60 = 42,704.42/x
3. Step 3: Cross multiply
   78,515.18x = 108,345.60 × 42,704.42
4. Step 4: Simplify right side
   78,515.18x = 4,626,835,465.82
5. Step 5: Solve for x
   x = 4,626,835,465.82/78,515.18
6. Step 6: Final answer
   x = 58,929.18