Finding the Fourth Proportional to 1,612.74, 2,419.32 and 516.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,612.74 : 2,419.32 = 516.72 : x
2. Step 2: Convert to fraction form
   1,612.74/2,419.32 = 516.72/x
3. Step 3: Cross multiply
   1,612.74x = 2,419.32 × 516.72
4. Step 4: Simplify right side
   1,612.74x = 1,250,111.03
5. Step 5: Solve for x
   x = 1,250,111.03/1,612.74
6. Step 6: Final answer
   x = 775.15