Finding the Fourth Proportional to 12,429.16, 17,138.02 and 9,280.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,429.16 : 17,138.02 = 9,280.04 : x
2. Step 2: Convert to fraction form
   12,429.16/17,138.02 = 9,280.04/x
3. Step 3: Cross multiply
   12,429.16x = 17,138.02 × 9,280.04
4. Step 4: Simplify right side
   12,429.16x = 159,041,511.12
5. Step 5: Solve for x
   x = 159,041,511.12/12,429.16
6. Step 6: Final answer
   x = 12,795.84