Finding the Fourth Proportional to 1,339.73, 2,009.59 and 1,106.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.73 : 2,009.59 = 1,106.45 : x
2. Step 2: Convert to fraction form
   1,339.73/2,009.59 = 1,106.45/x
3. Step 3: Cross multiply
   1,339.73x = 2,009.59 × 1,106.45
4. Step 4: Simplify right side
   1,339.73x = 2,223,510.86
5. Step 5: Solve for x
   x = 2,223,510.86/1,339.73
6. Step 6: Final answer
   x = 1,659.67