Finding the Fourth Proportional to 5,123.98, 7,685.88 and 1,426.42

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.98 : 7,685.88 = 1,426.42 : x
2. Step 2: Convert to fraction form
   5,123.98/7,685.88 = 1,426.42/x
3. Step 3: Cross multiply
   5,123.98x = 7,685.88 × 1,426.42
4. Step 4: Simplify right side
   5,123.98x = 10,963,292.95
5. Step 5: Solve for x
   x = 10,963,292.95/5,123.98
6. Step 6: Final answer
   x = 2,139.60