Finding the Third Proportional to 422,820 and 889,906.50

Step by Step Solution

1. Step 1: Write the proportion equation
   422,820 : 889,906.50 = 889,906.50 : x
2. Step 2: Convert to fraction form
   422,820/889,906.50 = 889,906.50/x
3. Step 3: Cross multiply
   422,820x = 889,906.50 × 889,906.50
4. Step 4: Simplify right side
   422,820x = 791,933,578,742.25
5. Step 5: Solve for x
   x = 791,933,578,742.25/422,820
6. Step 6: Final answer
   x = 1,872,980.41