Finding the Third Proportional to 622,429 and 988,081.50

Step by Step Solution

1. Step 1: Write the proportion equation
   622,429 : 988,081.50 = 988,081.50 : x
2. Step 2: Convert to fraction form
   622,429/988,081.50 = 988,081.50/x
3. Step 3: Cross multiply
   622,429x = 988,081.50 × 988,081.50
4. Step 4: Simplify right side
   622,429x = 976,305,050,642.25
5. Step 5: Solve for x
   x = 976,305,050,642.25/622,429
6. Step 6: Final answer
   x = 1,568,540.43