Finding the Fourth Proportional to 3,725.69, 5,141.15 and 2,153.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,725.69 : 5,141.15 = 2,153.89 : x
2. Step 2: Convert to fraction form
   3,725.69/5,141.15 = 2,153.89/x
3. Step 3: Cross multiply
   3,725.69x = 5,141.15 × 2,153.89
4. Step 4: Simplify right side
   3,725.69x = 11,073,445.87
5. Step 5: Solve for x
   x = 11,073,445.87/3,725.69
6. Step 6: Final answer
   x = 2,972.19