Finding the Fourth Proportional to 1,661.59, 2,293.00 and 915.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,661.59 : 2,293.00 = 915.58 : x
2. Step 2: Convert to fraction form
   1,661.59/2,293.00 = 915.58/x
3. Step 3: Cross multiply
   1,661.59x = 2,293.00 × 915.58
4. Step 4: Simplify right side
   1,661.59x = 2,099,425.52
5. Step 5: Solve for x
   x = 2,099,425.52/1,661.59
6. Step 6: Final answer
   x = 1,263.50