Finding the Fourth Proportional to 78,711.18, 118,085.24 and 31,329.15

Step by Step Solution

1. Step 1: Write the proportion equation
   78,711.18 : 118,085.24 = 31,329.15 : x
2. Step 2: Convert to fraction form
   78,711.18/118,085.24 = 31,329.15/x
3. Step 3: Cross multiply
   78,711.18x = 118,085.24 × 31,329.15
4. Step 4: Simplify right side
   78,711.18x = 3,699,510,040.10
5. Step 5: Solve for x
   x = 3,699,510,040.10/78,711.18
6. Step 6: Final answer
   x = 47,001.07