Finding the Third Proportional to 1,243,376 and 1,869,680

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243,376 : 1,869,680 = 1,869,680 : x
2. Step 2: Convert to fraction form
   1,243,376/1,869,680 = 1,869,680/x
3. Step 3: Cross multiply
   1,243,376x = 1,869,680 × 1,869,680
4. Step 4: Simplify right side
   1,243,376x = 3,495,703,302,400
5. Step 5: Solve for x
   x = 3,495,703,302,400/1,243,376
6. Step 6: Final answer
   x = 2,811,461.14