Finding the Fourth Proportional to 5,435.74, 7,500.90 and 3,078.10

Step by Step Solution

1. Step 1: Write the proportion equation
   5,435.74 : 7,500.90 = 3,078.10 : x
2. Step 2: Convert to fraction form
   5,435.74/7,500.90 = 3,078.10/x
3. Step 3: Cross multiply
   5,435.74x = 7,500.90 × 3,078.10
4. Step 4: Simplify right side
   5,435.74x = 23,088,520.29
5. Step 5: Solve for x
   x = 23,088,520.29/5,435.74
6. Step 6: Final answer
   x = 4,247.54