Finding the Fourth Proportional to 10,427.72, 14,390.25 and 5,712.17

Step by Step Solution

1. Step 1: Write the proportion equation
   10,427.72 : 14,390.25 = 5,712.17 : x
2. Step 2: Convert to fraction form
   10,427.72/14,390.25 = 5,712.17/x
3. Step 3: Cross multiply
   10,427.72x = 14,390.25 × 5,712.17
4. Step 4: Simplify right side
   10,427.72x = 82,199,554.34
5. Step 5: Solve for x
   x = 82,199,554.34/10,427.72
6. Step 6: Final answer
   x = 7,882.79