Finding the Fourth Proportional to 1,363.55, 1,880.33 and 915.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,363.55 : 1,880.33 = 915.56 : x
2. Step 2: Convert to fraction form
   1,363.55/1,880.33 = 915.56/x
3. Step 3: Cross multiply
   1,363.55x = 1,880.33 × 915.56
4. Step 4: Simplify right side
   1,363.55x = 1,721,540.96
5. Step 5: Solve for x
   x = 1,721,540.96/1,363.55
6. Step 6: Final answer
   x = 1,262.54