Finding the Fourth Proportional to 10,215.72, 14,097.69 and 5,740.34

Step by Step Solution

1. Step 1: Write the proportion equation
   10,215.72 : 14,097.69 = 5,740.34 : x
2. Step 2: Convert to fraction form
   10,215.72/14,097.69 = 5,740.34/x
3. Step 3: Cross multiply
   10,215.72x = 14,097.69 × 5,740.34
4. Step 4: Simplify right side
   10,215.72x = 80,925,463.33
5. Step 5: Solve for x
   x = 80,925,463.33/10,215.72
6. Step 6: Final answer
   x = 7,921.66