Finding the Fourth Proportional to 1,370.96, 1,892.52 and 928.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,370.96 : 1,892.52 = 928.64 : x
2. Step 2: Convert to fraction form
   1,370.96/1,892.52 = 928.64/x
3. Step 3: Cross multiply
   1,370.96x = 1,892.52 × 928.64
4. Step 4: Simplify right side
   1,370.96x = 1,757,469.77
5. Step 5: Solve for x
   x = 1,757,469.77/1,370.96
6. Step 6: Final answer
   x = 1,281.93