Finding the Fourth Proportional to 1,661.84, 2,293.29 and 915.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,661.84 : 2,293.29 = 915.83 : x
2. Step 2: Convert to fraction form
   1,661.84/2,293.29 = 915.83/x
3. Step 3: Cross multiply
   1,661.84x = 2,293.29 × 915.83
4. Step 4: Simplify right side
   1,661.84x = 2,100,252.31
5. Step 5: Solve for x
   x = 2,100,252.31/1,661.84
6. Step 6: Final answer
   x = 1,263.82