Finding the Third Proportional to 442,786 and 917,078

Step by Step Solution

1. Step 1: Write the proportion equation
   442,786 : 917,078 = 917,078 : x
2. Step 2: Convert to fraction form
   442,786/917,078 = 917,078/x
3. Step 3: Cross multiply
   442,786x = 917,078 × 917,078
4. Step 4: Simplify right side
   442,786x = 841,032,058,084
5. Step 5: Solve for x
   x = 841,032,058,084/442,786
6. Step 6: Final answer
   x = 1,899,409.78