Finding the Fourth Proportional to 12,890.76, 17,797.82 and 9,901.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,890.76 : 17,797.82 = 9,901.25 : x
2. Step 2: Convert to fraction form
   12,890.76/17,797.82 = 9,901.25/x
3. Step 3: Cross multiply
   12,890.76x = 17,797.82 × 9,901.25
4. Step 4: Simplify right side
   12,890.76x = 176,220,526.78
5. Step 5: Solve for x
   x = 176,220,526.78/12,890.76
6. Step 6: Final answer
   x = 13,670.30