Finding the Fourth Proportional to 1,561.25, 2,155.01 and 898.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.25 : 2,155.01 = 898.54 : x
2. Step 2: Convert to fraction form
   1,561.25/2,155.01 = 898.54/x
3. Step 3: Cross multiply
   1,561.25x = 2,155.01 × 898.54
4. Step 4: Simplify right side
   1,561.25x = 1,936,362.69
5. Step 5: Solve for x
   x = 1,936,362.69/1,561.25
6. Step 6: Final answer
   x = 1,240.26