Finding the Fourth Proportional to 1,346.91, 1,860.15 and 928.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,346.91 : 1,860.15 = 928.35 : x
2. Step 2: Convert to fraction form
   1,346.91/1,860.15 = 928.35/x
3. Step 3: Cross multiply
   1,346.91x = 1,860.15 × 928.35
4. Step 4: Simplify right side
   1,346.91x = 1,726,870.25
5. Step 5: Solve for x
   x = 1,726,870.25/1,346.91
6. Step 6: Final answer
   x = 1,282.10