Finding the Third Proportional to 293,386 and 642,768.50

Step by Step Solution

1. Step 1: Write the proportion equation
   293,386 : 642,768.50 = 642,768.50 : x
2. Step 2: Convert to fraction form
   293,386/642,768.50 = 642,768.50/x
3. Step 3: Cross multiply
   293,386x = 642,768.50 × 642,768.50
4. Step 4: Simplify right side
   293,386x = 413,151,344,592.25
5. Step 5: Solve for x
   x = 413,151,344,592.25/293,386
6. Step 6: Final answer
   x = 1,408,217.65