Finding the Fourth Proportional to 8,290.32, 11,439.72 and 5,641.08

Step by Step Solution

1. Step 1: Write the proportion equation
   8,290.32 : 11,439.72 = 5,641.08 : x
2. Step 2: Convert to fraction form
   8,290.32/11,439.72 = 5,641.08/x
3. Step 3: Cross multiply
   8,290.32x = 11,439.72 × 5,641.08
4. Step 4: Simplify right side
   8,290.32x = 64,532,375.70
5. Step 5: Solve for x
   x = 64,532,375.70/8,290.32
6. Step 6: Final answer
   x = 7,784.06