Finding the Third Proportional to 878,726 and 1,917,830

Step by Step Solution

1. Step 1: Write the proportion equation
   878,726 : 1,917,830 = 1,917,830 : x
2. Step 2: Convert to fraction form
   878,726/1,917,830 = 1,917,830/x
3. Step 3: Cross multiply
   878,726x = 1,917,830 × 1,917,830
4. Step 4: Simplify right side
   878,726x = 3,678,071,908,900
5. Step 5: Solve for x
   x = 3,678,071,908,900/878,726
6. Step 6: Final answer
   x = 4,185,686.90