Finding the Third Proportional to 312,760.69 and 517,667.06

Step by Step Solution

1. Step 1: Write the proportion equation
   312,760.69 : 517,667.06 = 517,667.06 : x
2. Step 2: Convert to fraction form
   312,760.69/517,667.06 = 517,667.06/x
3. Step 3: Cross multiply
   312,760.69x = 517,667.06 × 517,667.06
4. Step 4: Simplify right side
   312,760.69x = 267,979,187,597.38
5. Step 5: Solve for x
   x = 267,979,187,597.38/312,760.69
6. Step 6: Final answer
   x = 856,818.64