Finding the Fourth Proportional to 1,256.72, 1,885.06 and 516.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,256.72 : 1,885.06 = 516.18 : x
2. Step 2: Convert to fraction form
   1,256.72/1,885.06 = 516.18/x
3. Step 3: Cross multiply
   1,256.72x = 1,885.06 × 516.18
4. Step 4: Simplify right side
   1,256.72x = 973,030.27
5. Step 5: Solve for x
   x = 973,030.27/1,256.72
6. Step 6: Final answer
   x = 774.26