Finding the Fourth Proportional to 15,675.57, 21,642.53 and 9,716.00

Step by Step Solution

1. Step 1: Write the proportion equation
   15,675.57 : 21,642.53 = 9,716.00 : x
2. Step 2: Convert to fraction form
   15,675.57/21,642.53 = 9,716.00/x
3. Step 3: Cross multiply
   15,675.57x = 21,642.53 × 9,716.00
4. Step 4: Simplify right side
   15,675.57x = 210,278,664.69
5. Step 5: Solve for x
   x = 210,278,664.69/15,675.57
6. Step 6: Final answer
   x = 13,414.42