Finding the Fourth Proportional to 10,396.71, 14,347.42 and 5,680.99

Step by Step Solution

1. Step 1: Write the proportion equation
   10,396.71 : 14,347.42 = 5,680.99 : x
2. Step 2: Convert to fraction form
   10,396.71/14,347.42 = 5,680.99/x
3. Step 3: Cross multiply
   10,396.71x = 14,347.42 × 5,680.99
4. Step 4: Simplify right side
   10,396.71x = 81,507,549.55
5. Step 5: Solve for x
   x = 81,507,549.55/10,396.71
6. Step 6: Final answer
   x = 7,839.74