Finding the Third Proportional to 611,900.50 and 881,319.50

Step by Step Solution

1. Step 1: Write the proportion equation
   611,900.50 : 881,319.50 = 881,319.50 : x
2. Step 2: Convert to fraction form
   611,900.50/881,319.50 = 881,319.50/x
3. Step 3: Cross multiply
   611,900.50x = 881,319.50 × 881,319.50
4. Step 4: Simplify right side
   611,900.50x = 776,724,061,080.25
5. Step 5: Solve for x
   x = 776,724,061,080.25/611,900.50
6. Step 6: Final answer
   x = 1,269,363.34