Finding the Fourth Proportional to 2,995.29, 4,493.60 and 915.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,995.29 : 4,493.60 = 915.31 : x
2. Step 2: Convert to fraction form
   2,995.29/4,493.60 = 915.31/x
3. Step 3: Cross multiply
   2,995.29x = 4,493.60 × 915.31
4. Step 4: Simplify right side
   2,995.29x = 4,113,041.49
5. Step 5: Solve for x
   x = 4,113,041.49/2,995.29
6. Step 6: Final answer
   x = 1,373.17