Finding the Fourth Proportional to 1,904.08, 2,856.72 and 980.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,904.08 : 2,856.72 = 980.32 : x
2. Step 2: Convert to fraction form
   1,904.08/2,856.72 = 980.32/x
3. Step 3: Cross multiply
   1,904.08x = 2,856.72 × 980.32
4. Step 4: Simplify right side
   1,904.08x = 2,800,499.75
5. Step 5: Solve for x
   x = 2,800,499.75/1,904.08
6. Step 6: Final answer
   x = 1,470.79