Finding the Fourth Proportional to 5,123.94, 7,686.04 and 1,426.16

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.94 : 7,686.04 = 1,426.16 : x
2. Step 2: Convert to fraction form
   5,123.94/7,686.04 = 1,426.16/x
3. Step 3: Cross multiply
   5,123.94x = 7,686.04 × 1,426.16
4. Step 4: Simplify right side
   5,123.94x = 10,961,522.81
5. Step 5: Solve for x
   x = 10,961,522.81/5,123.94
6. Step 6: Final answer
   x = 2,139.28