Finding the Fourth Proportional to 2,377.15, 3,563.63 and 915.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,377.15 : 3,563.63 = 915.30 : x
2. Step 2: Convert to fraction form
   2,377.15/3,563.63 = 915.30/x
3. Step 3: Cross multiply
   2,377.15x = 3,563.63 × 915.30
4. Step 4: Simplify right side
   2,377.15x = 3,261,789.39
5. Step 5: Solve for x
   x = 3,261,789.39/2,377.15
6. Step 6: Final answer
   x = 1,372.14