Finding the Fourth Proportional to 1,097.89, 1,516.25 and 890.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,097.89 : 1,516.25 = 890.12 : x
2. Step 2: Convert to fraction form
   1,097.89/1,516.25 = 890.12/x
3. Step 3: Cross multiply
   1,097.89x = 1,516.25 × 890.12
4. Step 4: Simplify right side
   1,097.89x = 1,349,650.47
5. Step 5: Solve for x
   x = 1,349,650.47/1,097.89
6. Step 6: Final answer
   x = 1,229.32