Finding the Fourth Proportional to 1,758.28, 2,426.39 and 972.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,758.28 : 2,426.39 = 972.31 : x
2. Step 2: Convert to fraction form
   1,758.28/2,426.39 = 972.31/x
3. Step 3: Cross multiply
   1,758.28x = 2,426.39 × 972.31
4. Step 4: Simplify right side
   1,758.28x = 2,359,198.40
5. Step 5: Solve for x
   x = 2,359,198.40/1,758.28
6. Step 6: Final answer
   x = 1,341.76