Finding the Fourth Proportional to 6,478.56, 8,933.52 and 4,242.40

Step by Step Solution

1. Step 1: Write the proportion equation
   6,478.56 : 8,933.52 = 4,242.40 : x
2. Step 2: Convert to fraction form
   6,478.56/8,933.52 = 4,242.40/x
3. Step 3: Cross multiply
   6,478.56x = 8,933.52 × 4,242.40
4. Step 4: Simplify right side
   6,478.56x = 37,899,565.25
5. Step 5: Solve for x
   x = 37,899,565.25/6,478.56
6. Step 6: Final answer
   x = 5,850.00