Finding the Fourth Proportional to 1,623.57, 2,240.41 and 915.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,623.57 : 2,240.41 = 915.45 : x
2. Step 2: Convert to fraction form
   1,623.57/2,240.41 = 915.45/x
3. Step 3: Cross multiply
   1,623.57x = 2,240.41 × 915.45
4. Step 4: Simplify right side
   1,623.57x = 2,050,983.33
5. Step 5: Solve for x
   x = 2,050,983.33/1,623.57
6. Step 6: Final answer
   x = 1,263.26