Finding the Fourth Proportional to 1,504.76, 2,076.16 and 915.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,504.76 : 2,076.16 = 915.28 : x
2. Step 2: Convert to fraction form
   1,504.76/2,076.16 = 915.28/x
3. Step 3: Cross multiply
   1,504.76x = 2,076.16 × 915.28
4. Step 4: Simplify right side
   1,504.76x = 1,900,267.72
5. Step 5: Solve for x
   x = 1,900,267.72/1,504.76
6. Step 6: Final answer
   x = 1,262.84