Finding the Third Proportional to 402,123 and 622,075.50

Step by Step Solution

1. Step 1: Write the proportion equation
   402,123 : 622,075.50 = 622,075.50 : x
2. Step 2: Convert to fraction form
   402,123/622,075.50 = 622,075.50/x
3. Step 3: Cross multiply
   402,123x = 622,075.50 × 622,075.50
4. Step 4: Simplify right side
   402,123x = 386,977,927,700.25
5. Step 5: Solve for x
   x = 386,977,927,700.25/402,123
6. Step 6: Final answer
   x = 962,337.21