Finding the Fourth Proportional to 12,634.77, 17,421.54 and 8,091.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,634.77 : 17,421.54 = 8,091.48 : x
2. Step 2: Convert to fraction form
   12,634.77/17,421.54 = 8,091.48/x
3. Step 3: Cross multiply
   12,634.77x = 17,421.54 × 8,091.48
4. Step 4: Simplify right side
   12,634.77x = 140,966,042.48
5. Step 5: Solve for x
   x = 140,966,042.48/12,634.77
6. Step 6: Final answer
   x = 11,156.99