Finding the Fourth Proportional to 1,342.71, 2,009.85 and 923.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,342.71 : 2,009.85 = 923.79 : x
2. Step 2: Convert to fraction form
   1,342.71/2,009.85 = 923.79/x
3. Step 3: Cross multiply
   1,342.71x = 2,009.85 × 923.79
4. Step 4: Simplify right side
   1,342.71x = 1,856,679.33
5. Step 5: Solve for x
   x = 1,856,679.33/1,342.71
6. Step 6: Final answer
   x = 1,382.79