Finding the Fourth Proportional to 1,623.98, 2,241.06 and 915.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,623.98 : 2,241.06 = 915.83 : x
2. Step 2: Convert to fraction form
   1,623.98/2,241.06 = 915.83/x
3. Step 3: Cross multiply
   1,623.98x = 2,241.06 × 915.83
4. Step 4: Simplify right side
   1,623.98x = 2,052,414.20
5. Step 5: Solve for x
   x = 2,052,414.20/1,623.98
6. Step 6: Final answer
   x = 1,263.82