Finding the Fourth Proportional to 1,613.89, 2,227.14 and 915.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,613.89 : 2,227.14 = 915.25 : x
2. Step 2: Convert to fraction form
   1,613.89/2,227.14 = 915.25/x
3. Step 3: Cross multiply
   1,613.89x = 2,227.14 × 915.25
4. Step 4: Simplify right side
   1,613.89x = 2,038,389.89
5. Step 5: Solve for x
   x = 2,038,389.89/1,613.89
6. Step 6: Final answer
   x = 1,263.03