Finding the Fourth Proportional to 78,806.50, 109,310.15 and 75,969.47

Step by Step Solution

1. Step 1: Write the proportion equation
   78,806.50 : 109,310.15 = 75,969.47 : x
2. Step 2: Convert to fraction form
   78,806.50/109,310.15 = 75,969.47/x
3. Step 3: Cross multiply
   78,806.50x = 109,310.15 × 75,969.47
4. Step 4: Simplify right side
   78,806.50x = 8,304,234,161.12
5. Step 5: Solve for x
   x = 8,304,234,161.12/78,806.50
6. Step 6: Final answer
   x = 105,374.99