Finding the Fourth Proportional to 12,428.48, 17,111.92 and 10,535.92

Step by Step Solution

1. Step 1: Write the proportion equation
   12,428.48 : 17,111.92 = 10,535.92 : x
2. Step 2: Convert to fraction form
   12,428.48/17,111.92 = 10,535.92/x
3. Step 3: Cross multiply
   12,428.48x = 17,111.92 × 10,535.92
4. Step 4: Simplify right side
   12,428.48x = 180,289,820.17
5. Step 5: Solve for x
   x = 180,289,820.17/12,428.48
6. Step 6: Final answer
   x = 14,506.18