Finding the Third Proportional to 899,910 and 1,265,665.50

Step by Step Solution

1. Step 1: Write the proportion equation
   899,910 : 1,265,665.50 = 1,265,665.50 : x
2. Step 2: Convert to fraction form
   899,910/1,265,665.50 = 1,265,665.50/x
3. Step 3: Cross multiply
   899,910x = 1,265,665.50 × 1,265,665.50
4. Step 4: Simplify right side
   899,910x = 1,601,909,157,890.25
5. Step 5: Solve for x
   x = 1,601,909,157,890.25/899,910
6. Step 6: Final answer
   x = 1,780,077.07