Finding the Fourth Proportional to 78,311.32, 108,068.72 and 42,501.36

Step by Step Solution

1. Step 1: Write the proportion equation
   78,311.32 : 108,068.72 = 42,501.36 : x
2. Step 2: Convert to fraction form
   78,311.32/108,068.72 = 42,501.36/x
3. Step 3: Cross multiply
   78,311.32x = 108,068.72 × 42,501.36
4. Step 4: Simplify right side
   78,311.32x = 4,593,067,573.46
5. Step 5: Solve for x
   x = 4,593,067,573.46/78,311.32
6. Step 6: Final answer
   x = 58,651.39