Finding the Fourth Proportional to 12,892.50, 17,790.30 and 7,226.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,892.50 : 17,790.30 = 7,226.76 : x
2. Step 2: Convert to fraction form
   12,892.50/17,790.30 = 7,226.76/x
3. Step 3: Cross multiply
   12,892.50x = 17,790.30 × 7,226.76
4. Step 4: Simplify right side
   12,892.50x = 128,566,228.43
5. Step 5: Solve for x
   x = 128,566,228.43/12,892.50
6. Step 6: Final answer
   x = 9,972.17