Finding the Third Proportional to 1,218,992 and 1,859,428

Step by Step Solution

1. Step 1: Write the proportion equation
   1,218,992 : 1,859,428 = 1,859,428 : x
2. Step 2: Convert to fraction form
   1,218,992/1,859,428 = 1,859,428/x
3. Step 3: Cross multiply
   1,218,992x = 1,859,428 × 1,859,428
4. Step 4: Simplify right side
   1,218,992x = 3,457,472,487,184
5. Step 5: Solve for x
   x = 3,457,472,487,184/1,218,992
6. Step 6: Final answer
   x = 2,836,337.31