Finding the Third Proportional to 2,138,443.50 and 4,428,463.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,138,443.50 : 4,428,463.50 = 4,428,463.50 : x
2. Step 2: Convert to fraction form
   2,138,443.50/4,428,463.50 = 4,428,463.50/x
3. Step 3: Cross multiply
   2,138,443.50x = 4,428,463.50 × 4,428,463.50
4. Step 4: Simplify right side
   2,138,443.50x = 19,611,288,970,832.25
5. Step 5: Solve for x
   x = 19,611,288,970,832.25/2,138,443.50
6. Step 6: Final answer
   x = 9,170,824.00