Finding the Fourth Proportional to 5,898.60, 8,142.56 and 3,912.08

Step by Step Solution

1. Step 1: Write the proportion equation
   5,898.60 : 8,142.56 = 3,912.08 : x
2. Step 2: Convert to fraction form
   5,898.60/8,142.56 = 3,912.08/x
3. Step 3: Cross multiply
   5,898.60x = 8,142.56 × 3,912.08
4. Step 4: Simplify right side
   5,898.60x = 31,854,300.52
5. Step 5: Solve for x
   x = 31,854,300.52/5,898.60
6. Step 6: Final answer
   x = 5,400.32