Finding the Fourth Proportional to 1,164.30, 1,603.56 and 915.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,164.30 : 1,603.56 = 915.24 : x
2. Step 2: Convert to fraction form
   1,164.30/1,603.56 = 915.24/x
3. Step 3: Cross multiply
   1,164.30x = 1,603.56 × 915.24
4. Step 4: Simplify right side
   1,164.30x = 1,467,642.25
5. Step 5: Solve for x
   x = 1,467,642.25/1,164.30
6. Step 6: Final answer
   x = 1,260.54