Finding the Fourth Proportional to 12,992.00, 17,920.04 and 8,274.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,992.00 : 17,920.04 = 8,274.15 : x
2. Step 2: Convert to fraction form
   12,992.00/17,920.04 = 8,274.15/x
3. Step 3: Cross multiply
   12,992.00x = 17,920.04 × 8,274.15
4. Step 4: Simplify right side
   12,992.00x = 148,273,057.60
5. Step 5: Solve for x
   x = 148,273,057.60/12,992.00
6. Step 6: Final answer
   x = 11,412.65