Finding the Fourth Proportional to 17,856.53, 24,643.81 and 9,900.28

Step by Step Solution

1. Step 1: Write the proportion equation
   17,856.53 : 24,643.81 = 9,900.28 : x
2. Step 2: Convert to fraction form
   17,856.53/24,643.81 = 9,900.28/x
3. Step 3: Cross multiply
   17,856.53x = 24,643.81 × 9,900.28
4. Step 4: Simplify right side
   17,856.53x = 243,980,619.27
5. Step 5: Solve for x
   x = 243,980,619.27/17,856.53
6. Step 6: Final answer
   x = 13,663.38