Finding the Fourth Proportional to 1,661.56, 2,293.06 and 915.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,661.56 : 2,293.06 = 915.52 : x
2. Step 2: Convert to fraction form
   1,661.56/2,293.06 = 915.52/x
3. Step 3: Cross multiply
   1,661.56x = 2,293.06 × 915.52
4. Step 4: Simplify right side
   1,661.56x = 2,099,336.42
5. Step 5: Solve for x
   x = 2,099,336.42/1,661.56
6. Step 6: Final answer
   x = 1,263.47