Finding the Third Proportional to 1,429,691 and 2,178,078

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429,691 : 2,178,078 = 2,178,078 : x
2. Step 2: Convert to fraction form
   1,429,691/2,178,078 = 2,178,078/x
3. Step 3: Cross multiply
   1,429,691x = 2,178,078 × 2,178,078
4. Step 4: Simplify right side
   1,429,691x = 4,744,023,774,084
5. Step 5: Solve for x
   x = 4,744,023,774,084/1,429,691
6. Step 6: Final answer
   x = 3,318,216.16