Finding the Fourth Proportional to 12,427.20, 17,146.72 and 9,071.84

Step by Step Solution

1. Step 1: Write the proportion equation
   12,427.20 : 17,146.72 = 9,071.84 : x
2. Step 2: Convert to fraction form
   12,427.20/17,146.72 = 9,071.84/x
3. Step 3: Cross multiply
   12,427.20x = 17,146.72 × 9,071.84
4. Step 4: Simplify right side
   12,427.20x = 155,552,354.57
5. Step 5: Solve for x
   x = 155,552,354.57/12,427.20
6. Step 6: Final answer
   x = 12,517.09