Finding the Third Proportional to 665,820 and 942,120

Step by Step Solution

1. Step 1: Write the proportion equation
   665,820 : 942,120 = 942,120 : x
2. Step 2: Convert to fraction form
   665,820/942,120 = 942,120/x
3. Step 3: Cross multiply
   665,820x = 942,120 × 942,120
4. Step 4: Simplify right side
   665,820x = 887,590,094,400
5. Step 5: Solve for x
   x = 887,590,094,400/665,820
6. Step 6: Final answer
   x = 1,333,078.15