Finding the Fourth Proportional to 1,357.29, 1,872.32 and 931.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.29 : 1,872.32 = 931.59 : x
2. Step 2: Convert to fraction form
   1,357.29/1,872.32 = 931.59/x
3. Step 3: Cross multiply
   1,357.29x = 1,872.32 × 931.59
4. Step 4: Simplify right side
   1,357.29x = 1,744,229.93
5. Step 5: Solve for x
   x = 1,744,229.93/1,357.29
6. Step 6: Final answer
   x = 1,285.08