Finding the Fourth Proportional to 10,429.92, 14,307.57 and 9,864.99

Step by Step Solution

1. Step 1: Write the proportion equation
   10,429.92 : 14,307.57 = 9,864.99 : x
2. Step 2: Convert to fraction form
   10,429.92/14,307.57 = 9,864.99/x
3. Step 3: Cross multiply
   10,429.92x = 14,307.57 × 9,864.99
4. Step 4: Simplify right side
   10,429.92x = 141,144,034.97
5. Step 5: Solve for x
   x = 141,144,034.97/10,429.92
6. Step 6: Final answer
   x = 13,532.61