Finding the Fourth Proportional to 78,472.62, 108,291 and 42,662.31

Step by Step Solution

1. Step 1: Write the proportion equation
   78,472.62 : 108,291 = 42,662.31 : x
2. Step 2: Convert to fraction form
   78,472.62/108,291 = 42,662.31/x
3. Step 3: Cross multiply
   78,472.62x = 108,291 × 42,662.31
4. Step 4: Simplify right side
   78,472.62x = 4,619,944,212.21
5. Step 5: Solve for x
   x = 4,619,944,212.21/78,472.62
6. Step 6: Final answer
   x = 58,873.33