Finding the Fourth Proportional to 3,665.53, 5,058.43 and 2,152.79

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.53 : 5,058.43 = 2,152.79 : x
2. Step 2: Convert to fraction form
   3,665.53/5,058.43 = 2,152.79/x
3. Step 3: Cross multiply
   3,665.53x = 5,058.43 × 2,152.79
4. Step 4: Simplify right side
   3,665.53x = 10,889,737.52
5. Step 5: Solve for x
   x = 10,889,737.52/3,665.53
6. Step 6: Final answer
   x = 2,970.85