Finding the Fourth Proportional to 2,320.32, 3,478.14 and 1,020.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,320.32 : 3,478.14 = 1,020.72 : x
2. Step 2: Convert to fraction form
   2,320.32/3,478.14 = 1,020.72/x
3. Step 3: Cross multiply
   2,320.32x = 3,478.14 × 1,020.72
4. Step 4: Simplify right side
   2,320.32x = 3,550,207.06
5. Step 5: Solve for x
   x = 3,550,207.06/2,320.32
6. Step 6: Final answer
   x = 1,530.05