Finding the Fourth Proportional to 10,557.39, 14,565 and 9,718.14

Step by Step Solution

1. Step 1: Write the proportion equation
   10,557.39 : 14,565 = 9,718.14 : x
2. Step 2: Convert to fraction form
   10,557.39/14,565 = 9,718.14/x
3. Step 3: Cross multiply
   10,557.39x = 14,565 × 9,718.14
4. Step 4: Simplify right side
   10,557.39x = 141,544,709.10
5. Step 5: Solve for x
   x = 141,544,709.10/10,557.39
6. Step 6: Final answer
   x = 13,407.17