Finding the Fourth Proportional to 5,407.98, 8,111.24 and 2,123.38

Step by Step Solution

1. Step 1: Write the proportion equation
   5,407.98 : 8,111.24 = 2,123.38 : x
2. Step 2: Convert to fraction form
   5,407.98/8,111.24 = 2,123.38/x
3. Step 3: Cross multiply
   5,407.98x = 8,111.24 × 2,123.38
4. Step 4: Simplify right side
   5,407.98x = 17,223,252.28
5. Step 5: Solve for x
   x = 17,223,252.28/5,407.98
6. Step 6: Final answer
   x = 3,184.78