Finding the Third Proportional to 556,716 and 1,219,830

Step by Step Solution

1. Step 1: Write the proportion equation
   556,716 : 1,219,830 = 1,219,830 : x
2. Step 2: Convert to fraction form
   556,716/1,219,830 = 1,219,830/x
3. Step 3: Cross multiply
   556,716x = 1,219,830 × 1,219,830
4. Step 4: Simplify right side
   556,716x = 1,487,985,228,900
5. Step 5: Solve for x
   x = 1,487,985,228,900/556,716
6. Step 6: Final answer
   x = 2,672,790.49