Finding the Fourth Proportional to 3,724.25, 5,139.17 and 2,152.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,724.25 : 5,139.17 = 2,152.45 : x
2. Step 2: Convert to fraction form
   3,724.25/5,139.17 = 2,152.45/x
3. Step 3: Cross multiply
   3,724.25x = 5,139.17 × 2,152.45
4. Step 4: Simplify right side
   3,724.25x = 11,061,782.86
5. Step 5: Solve for x
   x = 11,061,782.86/3,724.25
6. Step 6: Final answer
   x = 2,970.20