Finding the Third Proportional to 339,050.81 and 512,946

Step by Step Solution

1. Step 1: Write the proportion equation
   339,050.81 : 512,946 = 512,946 : x
2. Step 2: Convert to fraction form
   339,050.81/512,946 = 512,946/x
3. Step 3: Cross multiply
   339,050.81x = 512,946 × 512,946
4. Step 4: Simplify right side
   339,050.81x = 263,113,598,916
5. Step 5: Solve for x
   x = 263,113,598,916/339,050.81
6. Step 6: Final answer
   x = 776,029.99