Finding the Fourth Proportional to 12,513.28, 17,269.50 and 7,477.39

Step by Step Solution

1. Step 1: Write the proportion equation
   12,513.28 : 17,269.50 = 7,477.39 : x
2. Step 2: Convert to fraction form
   12,513.28/17,269.50 = 7,477.39/x
3. Step 3: Cross multiply
   12,513.28x = 17,269.50 × 7,477.39
4. Step 4: Simplify right side
   12,513.28x = 129,130,786.61
5. Step 5: Solve for x
   x = 129,130,786.61/12,513.28
6. Step 6: Final answer
   x = 10,319.50