Finding the Third Proportional to 261,670 and 563,434.50

Step by Step Solution

1. Step 1: Write the proportion equation
   261,670 : 563,434.50 = 563,434.50 : x
2. Step 2: Convert to fraction form
   261,670/563,434.50 = 563,434.50/x
3. Step 3: Cross multiply
   261,670x = 563,434.50 × 563,434.50
4. Step 4: Simplify right side
   261,670x = 317,458,435,790.25
5. Step 5: Solve for x
   x = 317,458,435,790.25/261,670
6. Step 6: Final answer
   x = 1,213,201.50