Finding the Fourth Proportional to 1,661.23, 2,292.56 and 915.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,661.23 : 2,292.56 = 915.22 : x
2. Step 2: Convert to fraction form
   1,661.23/2,292.56 = 915.22/x
3. Step 3: Cross multiply
   1,661.23x = 2,292.56 × 915.22
4. Step 4: Simplify right side
   1,661.23x = 2,098,196.76
5. Step 5: Solve for x
   x = 2,098,196.76/1,661.23
6. Step 6: Final answer
   x = 1,263.04