Finding the Fourth Proportional to 2,123.47, 2,921.07 and 2,002.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.47 : 2,921.07 = 2,002.51 : x
2. Step 2: Convert to fraction form
   2,123.47/2,921.07 = 2,002.51/x
3. Step 3: Cross multiply
   2,123.47x = 2,921.07 × 2,002.51
4. Step 4: Simplify right side
   2,123.47x = 5,849,471.89
5. Step 5: Solve for x
   x = 5,849,471.89/2,123.47
6. Step 6: Final answer
   x = 2,754.68