Finding the Third Proportional to 415,080 and 622,621.50

Step by Step Solution

1. Step 1: Write the proportion equation
   415,080 : 622,621.50 = 622,621.50 : x
2. Step 2: Convert to fraction form
   415,080/622,621.50 = 622,621.50/x
3. Step 3: Cross multiply
   415,080x = 622,621.50 × 622,621.50
4. Step 4: Simplify right side
   415,080x = 387,657,532,262.25
5. Step 5: Solve for x
   x = 387,657,532,262.25/415,080
6. Step 6: Final answer
   x = 933,934.50