Finding the Third Proportional to 513,115 and 804,920.50

Step by Step Solution

1. Step 1: Write the proportion equation
   513,115 : 804,920.50 = 804,920.50 : x
2. Step 2: Convert to fraction form
   513,115/804,920.50 = 804,920.50/x
3. Step 3: Cross multiply
   513,115x = 804,920.50 × 804,920.50
4. Step 4: Simplify right side
   513,115x = 647,897,011,320.25
5. Step 5: Solve for x
   x = 647,897,011,320.25/513,115
6. Step 6: Final answer
   x = 1,262,674.08