Finding the Fourth Proportional to 1,391.30, 2,085.86 and 732.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391.30 : 2,085.86 = 732.31 : x
2. Step 2: Convert to fraction form
   1,391.30/2,085.86 = 732.31/x
3. Step 3: Cross multiply
   1,391.30x = 2,085.86 × 732.31
4. Step 4: Simplify right side
   1,391.30x = 1,527,495.08
5. Step 5: Solve for x
   x = 1,527,495.08/1,391.30
6. Step 6: Final answer
   x = 1,097.89