Finding the Fourth Proportional to 10,191.85, 14,065.43 and 5,715.89

Step by Step Solution

1. Step 1: Write the proportion equation
   10,191.85 : 14,065.43 = 5,715.89 : x
2. Step 2: Convert to fraction form
   10,191.85/14,065.43 = 5,715.89/x
3. Step 3: Cross multiply
   10,191.85x = 14,065.43 × 5,715.89
4. Step 4: Simplify right side
   10,191.85x = 80,396,422.10
5. Step 5: Solve for x
   x = 80,396,422.10/10,191.85
6. Step 6: Final answer
   x = 7,888.31