Finding the Third Proportional to 1,406,520 and 2,179,278

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406,520 : 2,179,278 = 2,179,278 : x
2. Step 2: Convert to fraction form
   1,406,520/2,179,278 = 2,179,278/x
3. Step 3: Cross multiply
   1,406,520x = 2,179,278 × 2,179,278
4. Step 4: Simplify right side
   1,406,520x = 4,749,252,601,284
5. Step 5: Solve for x
   x = 4,749,252,601,284/1,406,520
6. Step 6: Final answer
   x = 3,376,597.99