Finding the Fourth Proportional to 1,426.51, 1,967.38 and 928.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.51 : 1,967.38 = 928.77 : x
2. Step 2: Convert to fraction form
   1,426.51/1,967.38 = 928.77/x
3. Step 3: Cross multiply
   1,426.51x = 1,967.38 × 928.77
4. Step 4: Simplify right side
   1,426.51x = 1,827,243.52
5. Step 5: Solve for x
   x = 1,827,243.52/1,426.51
6. Step 6: Final answer
   x = 1,280.92