Finding the Fourth Proportional to 2,312.79, 3,470.69 and 1,081.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,312.79 : 3,470.69 = 1,081.54 : x
2. Step 2: Convert to fraction form
   2,312.79/3,470.69 = 1,081.54/x
3. Step 3: Cross multiply
   2,312.79x = 3,470.69 × 1,081.54
4. Step 4: Simplify right side
   2,312.79x = 3,753,690.06
5. Step 5: Solve for x
   x = 3,753,690.06/2,312.79
6. Step 6: Final answer
   x = 1,623.01