Finding the Fourth Proportional to 1,928.85, 2,661.81 and 1,066.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,928.85 : 2,661.81 = 1,066.50 : x
2. Step 2: Convert to fraction form
   1,928.85/2,661.81 = 1,066.50/x
3. Step 3: Cross multiply
   1,928.85x = 2,661.81 × 1,066.50
4. Step 4: Simplify right side
   1,928.85x = 2,838,822.36
5. Step 5: Solve for x
   x = 2,838,822.36/1,928.85
6. Step 6: Final answer
   x = 1,471.77