Finding the Fourth Proportional to 10,396.80, 14,346.72 and 5,681.07

Step by Step Solution

1. Step 1: Write the proportion equation
   10,396.80 : 14,346.72 = 5,681.07 : x
2. Step 2: Convert to fraction form
   10,396.80/14,346.72 = 5,681.07/x
3. Step 3: Cross multiply
   10,396.80x = 14,346.72 × 5,681.07
4. Step 4: Simplify right side
   10,396.80x = 81,504,720.59
5. Step 5: Solve for x
   x = 81,504,720.59/10,396.80
6. Step 6: Final answer
   x = 7,839.40