Finding the Fourth Proportional to 6,074.40, 8,382.72 and 3,978.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,074.40 : 8,382.72 = 3,978.50 : x
2. Step 2: Convert to fraction form
   6,074.40/8,382.72 = 3,978.50/x
3. Step 3: Cross multiply
   6,074.40x = 8,382.72 × 3,978.50
4. Step 4: Simplify right side
   6,074.40x = 33,350,651.52
5. Step 5: Solve for x
   x = 33,350,651.52/6,074.40
6. Step 6: Final answer
   x = 5,490.36