Finding the Fourth Proportional to 1,757.90, 2,426.20 and 1,011.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,757.90 : 2,426.20 = 1,011.72 : x
2. Step 2: Convert to fraction form
   1,757.90/2,426.20 = 1,011.72/x
3. Step 3: Cross multiply
   1,757.90x = 2,426.20 × 1,011.72
4. Step 4: Simplify right side
   1,757.90x = 2,454,632.82
5. Step 5: Solve for x
   x = 2,454,632.82/1,757.90
6. Step 6: Final answer
   x = 1,396.34