Finding the Fourth Proportional to 8,809.74, 12,162.78 and 5,274.18

Step by Step Solution

1. Step 1: Write the proportion equation
   8,809.74 : 12,162.78 = 5,274.18 : x
2. Step 2: Convert to fraction form
   8,809.74/12,162.78 = 5,274.18/x
3. Step 3: Cross multiply
   8,809.74x = 12,162.78 × 5,274.18
4. Step 4: Simplify right side
   8,809.74x = 64,148,691.02
5. Step 5: Solve for x
   x = 64,148,691.02/8,809.74
6. Step 6: Final answer
   x = 7,281.56