Finding the Fourth Proportional to 5,127.30, 7,690.55 and 1,429.25

Step by Step Solution

1. Step 1: Write the proportion equation
   5,127.30 : 7,690.55 = 1,429.25 : x
2. Step 2: Convert to fraction form
   5,127.30/7,690.55 = 1,429.25/x
3. Step 3: Cross multiply
   5,127.30x = 7,690.55 × 1,429.25
4. Step 4: Simplify right side
   5,127.30x = 10,991,672.99
5. Step 5: Solve for x
   x = 10,991,672.99/5,127.30
6. Step 6: Final answer
   x = 2,143.75