Finding the Fourth Proportional to 12,893.49, 17,792.67 and 7,228.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,893.49 : 17,792.67 = 7,228.47 : x
2. Step 2: Convert to fraction form
   12,893.49/17,792.67 = 7,228.47/x
3. Step 3: Cross multiply
   12,893.49x = 17,792.67 × 7,228.47
4. Step 4: Simplify right side
   12,893.49x = 128,613,781.31
5. Step 5: Solve for x
   x = 128,613,781.31/12,893.49
6. Step 6: Final answer
   x = 9,975.09