Finding the Fourth Proportional to 12,128.25, 16,737.27 and 7,415.13

Step by Step Solution

1. Step 1: Write the proportion equation
   12,128.25 : 16,737.27 = 7,415.13 : x
2. Step 2: Convert to fraction form
   12,128.25/16,737.27 = 7,415.13/x
3. Step 3: Cross multiply
   12,128.25x = 16,737.27 × 7,415.13
4. Step 4: Simplify right side
   12,128.25x = 124,109,032.90
5. Step 5: Solve for x
   x = 124,109,032.90/12,128.25
6. Step 6: Final answer
   x = 10,233.05