Finding the Third Proportional to 1,139,280 and 2,689,368

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139,280 : 2,689,368 = 2,689,368 : x
2. Step 2: Convert to fraction form
   1,139,280/2,689,368 = 2,689,368/x
3. Step 3: Cross multiply
   1,139,280x = 2,689,368 × 2,689,368
4. Step 4: Simplify right side
   1,139,280x = 7,232,700,239,424
5. Step 5: Solve for x
   x = 7,232,700,239,424/1,139,280
6. Step 6: Final answer
   x = 6,348,483.46