Finding the Fourth Proportional to 5,321.58, 7,980.82 and 3,565.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,321.58 : 7,980.82 = 3,565.50 : x
2. Step 2: Convert to fraction form
   5,321.58/7,980.82 = 3,565.50/x
3. Step 3: Cross multiply
   5,321.58x = 7,980.82 × 3,565.50
4. Step 4: Simplify right side
   5,321.58x = 28,455,613.71
5. Step 5: Solve for x
   x = 28,455,613.71/5,321.58
6. Step 6: Final answer
   x = 5,347.21