Finding the Fourth Proportional to 1,446.91, 1,996.25 and 915.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,446.91 : 1,996.25 = 915.65 : x
2. Step 2: Convert to fraction form
   1,446.91/1,996.25 = 915.65/x
3. Step 3: Cross multiply
   1,446.91x = 1,996.25 × 915.65
4. Step 4: Simplify right side
   1,446.91x = 1,827,870.47
5. Step 5: Solve for x
   x = 1,827,870.47/1,446.91
6. Step 6: Final answer
   x = 1,263.29