Finding the Third Proportional to 1,368,968.50 and 2,128,123

Step by Step Solution

1. Step 1: Write the proportion equation
   1,368,968.50 : 2,128,123 = 2,128,123 : x
2. Step 2: Convert to fraction form
   1,368,968.50/2,128,123 = 2,128,123/x
3. Step 3: Cross multiply
   1,368,968.50x = 2,128,123 × 2,128,123
4. Step 4: Simplify right side
   1,368,968.50x = 4,528,907,503,129
5. Step 5: Solve for x
   x = 4,528,907,503,129/1,368,968.50
6. Step 6: Final answer
   x = 3,308,262.76