Finding the Fourth Proportional to 1,634.50, 2,255.61 and 898.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,634.50 : 2,255.61 = 898.50 : x
2. Step 2: Convert to fraction form
   1,634.50/2,255.61 = 898.50/x
3. Step 3: Cross multiply
   1,634.50x = 2,255.61 × 898.50
4. Step 4: Simplify right side
   1,634.50x = 2,026,665.59
5. Step 5: Solve for x
   x = 2,026,665.59/1,634.50
6. Step 6: Final answer
   x = 1,239.93