Finding the Third Proportional to 1,018,686.38 and 1,378,561.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018,686.38 : 1,378,561.78 = 1,378,561.78 : x
2. Step 2: Convert to fraction form
   1,018,686.38/1,378,561.78 = 1,378,561.78/x
3. Step 3: Cross multiply
   1,018,686.38x = 1,378,561.78 × 1,378,561.78
4. Step 4: Simplify right side
   1,018,686.38x = 1,900,432,584,723.17
5. Step 5: Solve for x
   x = 1,900,432,584,723.17/1,018,686.38
6. Step 6: Final answer
   x = 1,865,571.81