Finding the Fourth Proportional to 1,449.63, 1,999.74 and 917.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,449.63 : 1,999.74 = 917.61 : x
2. Step 2: Convert to fraction form
   1,449.63/1,999.74 = 917.61/x
3. Step 3: Cross multiply
   1,449.63x = 1,999.74 × 917.61
4. Step 4: Simplify right side
   1,449.63x = 1,834,984.86
5. Step 5: Solve for x
   x = 1,834,984.86/1,449.63
6. Step 6: Final answer
   x = 1,265.83