Finding the Fourth Proportional to 10,086.50, 15,097.40 and 5,394.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,086.50 : 15,097.40 = 5,394.78 : x
2. Step 2: Convert to fraction form
   10,086.50/15,097.40 = 5,394.78/x
3. Step 3: Cross multiply
   10,086.50x = 15,097.40 × 5,394.78
4. Step 4: Simplify right side
   10,086.50x = 81,447,151.57
5. Step 5: Solve for x
   x = 81,447,151.57/10,086.50
6. Step 6: Final answer
   x = 8,074.87