Finding the Fourth Proportional to 10,191.25, 14,063.72 and 5,715.39

Step by Step Solution

1. Step 1: Write the proportion equation
   10,191.25 : 14,063.72 = 5,715.39 : x
2. Step 2: Convert to fraction form
   10,191.25/14,063.72 = 5,715.39/x
3. Step 3: Cross multiply
   10,191.25x = 14,063.72 × 5,715.39
4. Step 4: Simplify right side
   10,191.25x = 80,379,644.65
5. Step 5: Solve for x
   x = 80,379,644.65/10,191.25
6. Step 6: Final answer
   x = 7,887.12