Finding the Fourth Proportional to 78,321.32, 117,598.62 and 31,665.32

Step by Step Solution

1. Step 1: Write the proportion equation
   78,321.32 : 117,598.62 = 31,665.32 : x
2. Step 2: Convert to fraction form
   78,321.32/117,598.62 = 31,665.32/x
3. Step 3: Cross multiply
   78,321.32x = 117,598.62 × 31,665.32
4. Step 4: Simplify right side
   78,321.32x = 3,723,797,933.86
5. Step 5: Solve for x
   x = 3,723,797,933.86/78,321.32
6. Step 6: Final answer
   x = 47,545.14