Finding the Third Proportional to 366,390 and 772,140

Step by Step Solution

1. Step 1: Write the proportion equation
   366,390 : 772,140 = 772,140 : x
2. Step 2: Convert to fraction form
   366,390/772,140 = 772,140/x
3. Step 3: Cross multiply
   366,390x = 772,140 × 772,140
4. Step 4: Simplify right side
   366,390x = 596,200,179,600
5. Step 5: Solve for x
   x = 596,200,179,600/366,390
6. Step 6: Final answer
   x = 1,627,228.31