Finding the Fourth Proportional to 12,792.28, 17,654.61 and 7,486.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,792.28 : 17,654.61 = 7,486.78 : x
2. Step 2: Convert to fraction form
   12,792.28/17,654.61 = 7,486.78/x
3. Step 3: Cross multiply
   12,792.28x = 17,654.61 × 7,486.78
4. Step 4: Simplify right side
   12,792.28x = 132,176,181.06
5. Step 5: Solve for x
   x = 132,176,181.06/12,792.28
6. Step 6: Final answer
   x = 10,332.50