Finding the Fourth Proportional to 11,580.17, 17,285.50 and 9,947.21

Step by Step Solution

1. Step 1: Write the proportion equation
   11,580.17 : 17,285.50 = 9,947.21 : x
2. Step 2: Convert to fraction form
   11,580.17/17,285.50 = 9,947.21/x
3. Step 3: Cross multiply
   11,580.17x = 17,285.50 × 9,947.21
4. Step 4: Simplify right side
   11,580.17x = 171,942,424.46
5. Step 5: Solve for x
   x = 171,942,424.46/11,580.17
6. Step 6: Final answer
   x = 14,848.01