Finding the Third Proportional to 278,064 and 607,116

Step by Step Solution

1. Step 1: Write the proportion equation
   278,064 : 607,116 = 607,116 : x
2. Step 2: Convert to fraction form
   278,064/607,116 = 607,116/x
3. Step 3: Cross multiply
   278,064x = 607,116 × 607,116
4. Step 4: Simplify right side
   278,064x = 368,589,837,456
5. Step 5: Solve for x
   x = 368,589,837,456/278,064
6. Step 6: Final answer
   x = 1,325,557.56