Finding the Fourth Proportional to 11,900.52, 17,827.72 and 9,158.76

Step by Step Solution

1. Step 1: Write the proportion equation
   11,900.52 : 17,827.72 = 9,158.76 : x
2. Step 2: Convert to fraction form
   11,900.52/17,827.72 = 9,158.76/x
3. Step 3: Cross multiply
   11,900.52x = 17,827.72 × 9,158.76
4. Step 4: Simplify right side
   11,900.52x = 163,279,808.83
5. Step 5: Solve for x
   x = 163,279,808.83/11,900.52
6. Step 6: Final answer
   x = 13,720.39