Finding the Fourth Proportional to 1,606.46, 2,216.88 and 898.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,606.46 : 2,216.88 = 898.31 : x
2. Step 2: Convert to fraction form
   1,606.46/2,216.88 = 898.31/x
3. Step 3: Cross multiply
   1,606.46x = 2,216.88 × 898.31
4. Step 4: Simplify right side
   1,606.46x = 1,991,440.98
5. Step 5: Solve for x
   x = 1,991,440.98/1,606.46
6. Step 6: Final answer
   x = 1,239.65