Finding the Fourth Proportional to 6,174.89, 8,521.28 and 3,342.20

Step by Step Solution

1. Step 1: Write the proportion equation
   6,174.89 : 8,521.28 = 3,342.20 : x
2. Step 2: Convert to fraction form
   6,174.89/8,521.28 = 3,342.20/x
3. Step 3: Cross multiply
   6,174.89x = 8,521.28 × 3,342.20
4. Step 4: Simplify right side
   6,174.89x = 28,479,822.02
5. Step 5: Solve for x
   x = 28,479,822.02/6,174.89
6. Step 6: Final answer
   x = 4,612.20