Finding the Fourth Proportional to 2,558.72, 3,837.38 and 915.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,558.72 : 3,837.38 = 915.03 : x
2. Step 2: Convert to fraction form
   2,558.72/3,837.38 = 915.03/x
3. Step 3: Cross multiply
   2,558.72x = 3,837.38 × 915.03
4. Step 4: Simplify right side
   2,558.72x = 3,511,313.25
5. Step 5: Solve for x
   x = 3,511,313.25/2,558.72
6. Step 6: Final answer
   x = 1,372.29