Finding the Fourth Proportional to 78,311.98, 108,071.31 and 42,502.33

Step by Step Solution

1. Step 1: Write the proportion equation
   78,311.98 : 108,071.31 = 42,502.33 : x
2. Step 2: Convert to fraction form
   78,311.98/108,071.31 = 42,502.33/x
3. Step 3: Cross multiply
   78,311.98x = 108,071.31 × 42,502.33
4. Step 4: Simplify right side
   78,311.98x = 4,593,282,481.15
5. Step 5: Solve for x
   x = 4,593,282,481.15/78,311.98
6. Step 6: Final answer
   x = 58,653.64