Finding the Fourth Proportional to 1,909.68, 2,860.04 and 932.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,909.68 : 2,860.04 = 932.72 : x
2. Step 2: Convert to fraction form
   1,909.68/2,860.04 = 932.72/x
3. Step 3: Cross multiply
   1,909.68x = 2,860.04 × 932.72
4. Step 4: Simplify right side
   1,909.68x = 2,667,616.51
5. Step 5: Solve for x
   x = 2,667,616.51/1,909.68
6. Step 6: Final answer
   x = 1,396.89