Finding the Fourth Proportional to 2,301.12, 3,450.72 and 915.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,301.12 : 3,450.72 = 915.12 : x
2. Step 2: Convert to fraction form
   2,301.12/3,450.72 = 915.12/x
3. Step 3: Cross multiply
   2,301.12x = 3,450.72 × 915.12
4. Step 4: Simplify right side
   2,301.12x = 3,157,822.89
5. Step 5: Solve for x
   x = 3,157,822.89/2,301.12
6. Step 6: Final answer
   x = 1,372.30