Finding the Fourth Proportional to 1,644.63, 2,269.61 and 981.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,644.63 : 2,269.61 = 981.86 : x
2. Step 2: Convert to fraction form
   1,644.63/2,269.61 = 981.86/x
3. Step 3: Cross multiply
   1,644.63x = 2,269.61 × 981.86
4. Step 4: Simplify right side
   1,644.63x = 2,228,439.27
5. Step 5: Solve for x
   x = 2,228,439.27/1,644.63
6. Step 6: Final answer
   x = 1,354.98