Finding the Fourth Proportional to 1,087.38, 1,627.29 and 890.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.38 : 1,627.29 = 890.10 : x
2. Step 2: Convert to fraction form
   1,087.38/1,627.29 = 890.10/x
3. Step 3: Cross multiply
   1,087.38x = 1,627.29 × 890.10
4. Step 4: Simplify right side
   1,087.38x = 1,448,450.83
5. Step 5: Solve for x
   x = 1,448,450.83/1,087.38
6. Step 6: Final answer
   x = 1,332.06