Finding the Third Proportional to 1,311,222 and 1,978,894.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,311,222 : 1,978,894.50 = 1,978,894.50 : x
2. Step 2: Convert to fraction form
   1,311,222/1,978,894.50 = 1,978,894.50/x
3. Step 3: Cross multiply
   1,311,222x = 1,978,894.50 × 1,978,894.50
4. Step 4: Simplify right side
   1,311,222x = 3,916,023,442,130.25
5. Step 5: Solve for x
   x = 3,916,023,442,130.25/1,311,222
6. Step 6: Final answer
   x = 2,986,544.95