Finding the Fourth Proportional to 12,828.32, 17,701.90 and 7,449.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,828.32 : 17,701.90 = 7,449.32 : x
2. Step 2: Convert to fraction form
   12,828.32/17,701.90 = 7,449.32/x
3. Step 3: Cross multiply
   12,828.32x = 17,701.90 × 7,449.32
4. Step 4: Simplify right side
   12,828.32x = 131,867,117.71
5. Step 5: Solve for x
   x = 131,867,117.71/12,828.32
6. Step 6: Final answer
   x = 10,279.38