Finding the Third Proportional to 402,159 and 622,131.50

Step by Step Solution

1. Step 1: Write the proportion equation
   402,159 : 622,131.50 = 622,131.50 : x
2. Step 2: Convert to fraction form
   402,159/622,131.50 = 622,131.50/x
3. Step 3: Cross multiply
   402,159x = 622,131.50 × 622,131.50
4. Step 4: Simplify right side
   402,159x = 387,047,603,292.25
5. Step 5: Solve for x
   x = 387,047,603,292.25/402,159
6. Step 6: Final answer
   x = 962,424.32