Finding the Fourth Proportional to 10,191.60, 14,064.66 and 5,715.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,191.60 : 14,064.66 = 5,715.18 : x
2. Step 2: Convert to fraction form
   10,191.60/14,064.66 = 5,715.18/x
3. Step 3: Cross multiply
   10,191.60x = 14,064.66 × 5,715.18
4. Step 4: Simplify right side
   10,191.60x = 80,382,063.54
5. Step 5: Solve for x
   x = 80,382,063.54/10,191.60
6. Step 6: Final answer
   x = 7,887.09