Finding the Third Proportional to 52,616 and 80,490

Step by Step Solution

1. Step 1: Write the proportion equation
   52,616 : 80,490 = 80,490 : x
2. Step 2: Convert to fraction form
   52,616/80,490 = 80,490/x
3. Step 3: Cross multiply
   52,616x = 80,490 × 80,490
4. Step 4: Simplify right side
   52,616x = 6,478,640,100
5. Step 5: Solve for x
   x = 6,478,640,100/52,616
6. Step 6: Final answer
   x = 123,130.61