Finding the Fourth Proportional to 1,505.59, 2,076.44 and 915.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,505.59 : 2,076.44 = 915.71 : x
2. Step 2: Convert to fraction form
   1,505.59/2,076.44 = 915.71/x
3. Step 3: Cross multiply
   1,505.59x = 2,076.44 × 915.71
4. Step 4: Simplify right side
   1,505.59x = 1,901,401.91
5. Step 5: Solve for x
   x = 1,901,401.91/1,505.59
6. Step 6: Final answer
   x = 1,262.90