Finding the Fourth Proportional to 5,429.50, 8,145.60 and 2,507.20

Step by Step Solution

1. Step 1: Write the proportion equation
   5,429.50 : 8,145.60 = 2,507.20 : x
2. Step 2: Convert to fraction form
   5,429.50/8,145.60 = 2,507.20/x
3. Step 3: Cross multiply
   5,429.50x = 8,145.60 × 2,507.20
4. Step 4: Simplify right side
   5,429.50x = 20,422,648.32
5. Step 5: Solve for x
   x = 20,422,648.32/5,429.50
6. Step 6: Final answer
   x = 3,761.42