Finding the Third Proportional to 526,200 and 820,099.50

Step by Step Solution

1. Step 1: Write the proportion equation
   526,200 : 820,099.50 = 820,099.50 : x
2. Step 2: Convert to fraction form
   526,200/820,099.50 = 820,099.50/x
3. Step 3: Cross multiply
   526,200x = 820,099.50 × 820,099.50
4. Step 4: Simplify right side
   526,200x = 672,563,189,900.25
5. Step 5: Solve for x
   x = 672,563,189,900.25/526,200
6. Step 6: Final answer
   x = 1,278,151.25