Finding the Third Proportional to 619,317 and 872,140.50

Step by Step Solution

1. Step 1: Write the proportion equation
   619,317 : 872,140.50 = 872,140.50 : x
2. Step 2: Convert to fraction form
   619,317/872,140.50 = 872,140.50/x
3. Step 3: Cross multiply
   619,317x = 872,140.50 × 872,140.50
4. Step 4: Simplify right side
   619,317x = 760,629,051,740.25
5. Step 5: Solve for x
   x = 760,629,051,740.25/619,317
6. Step 6: Final answer
   x = 1,228,174.02