Finding the Fourth Proportional to 9,258.17, 12,776.29 and 5,279.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,258.17 : 12,776.29 = 5,279.32 : x
2. Step 2: Convert to fraction form
   9,258.17/12,776.29 = 5,279.32/x
3. Step 3: Cross multiply
   9,258.17x = 12,776.29 × 5,279.32
4. Step 4: Simplify right side
   9,258.17x = 67,450,123.32
5. Step 5: Solve for x
   x = 67,450,123.32/9,258.17
6. Step 6: Final answer
   x = 7,285.47