Finding the Fourth Proportional to 1,425.72, 2,139.02 and 1,015.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,425.72 : 2,139.02 = 1,015.68 : x
2. Step 2: Convert to fraction form
   1,425.72/2,139.02 = 1,015.68/x
3. Step 3: Cross multiply
   1,425.72x = 2,139.02 × 1,015.68
4. Step 4: Simplify right side
   1,425.72x = 2,172,559.83
5. Step 5: Solve for x
   x = 2,172,559.83/1,425.72
6. Step 6: Final answer
   x = 1,523.83