Finding the Fourth Proportional to 10,159.47, 13,991.00 and 9,526.61

Step by Step Solution

1. Step 1: Write the proportion equation
   10,159.47 : 13,991.00 = 9,526.61 : x
2. Step 2: Convert to fraction form
   10,159.47/13,991.00 = 9,526.61/x
3. Step 3: Cross multiply
   10,159.47x = 13,991.00 × 9,526.61
4. Step 4: Simplify right side
   10,159.47x = 133,286,682.92
5. Step 5: Solve for x
   x = 133,286,682.92/10,159.47
6. Step 6: Final answer
   x = 13,119.45