Finding the Fourth Proportional to 3,723.89, 5,139.60 and 2,152.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,723.89 : 5,139.60 = 2,152.94 : x
2. Step 2: Convert to fraction form
   3,723.89/5,139.60 = 2,152.94/x
3. Step 3: Cross multiply
   3,723.89x = 5,139.60 × 2,152.94
4. Step 4: Simplify right side
   3,723.89x = 11,065,250.42
5. Step 5: Solve for x
   x = 11,065,250.42/3,723.89
6. Step 6: Final answer
   x = 2,971.42