Finding the Fourth Proportional to 2,054.10, 3,081.12 and 515.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,054.10 : 3,081.12 = 515.10 : x
2. Step 2: Convert to fraction form
   2,054.10/3,081.12 = 515.10/x
3. Step 3: Cross multiply
   2,054.10x = 3,081.12 × 515.10
4. Step 4: Simplify right side
   2,054.10x = 1,587,084.91
5. Step 5: Solve for x
   x = 1,587,084.91/2,054.10
6. Step 6: Final answer
   x = 772.64