Finding the Fourth Proportional to 3,723.84, 5,139.12 and 2,152.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,723.84 : 5,139.12 = 2,152.48 : x
2. Step 2: Convert to fraction form
   3,723.84/5,139.12 = 2,152.48/x
3. Step 3: Cross multiply
   3,723.84x = 5,139.12 × 2,152.48
4. Step 4: Simplify right side
   3,723.84x = 11,061,853.02
5. Step 5: Solve for x
   x = 11,061,853.02/3,723.84
6. Step 6: Final answer
   x = 2,970.55