Finding the Fourth Proportional to 1,562.17, 2,155.63 and 898.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,562.17 : 2,155.63 = 898.89 : x
2. Step 2: Convert to fraction form
   1,562.17/2,155.63 = 898.89/x
3. Step 3: Cross multiply
   1,562.17x = 2,155.63 × 898.89
4. Step 4: Simplify right side
   1,562.17x = 1,937,674.25
5. Step 5: Solve for x
   x = 1,937,674.25/1,562.17
6. Step 6: Final answer
   x = 1,240.37