Finding the Third Proportional to 215,988 and 445,776.75

Step by Step Solution

1. Step 1: Write the proportion equation
   215,988 : 445,776.75 = 445,776.75 : x
2. Step 2: Convert to fraction form
   215,988/445,776.75 = 445,776.75/x
3. Step 3: Cross multiply
   215,988x = 445,776.75 × 445,776.75
4. Step 4: Simplify right side
   215,988x = 198,716,910,840.56
5. Step 5: Solve for x
   x = 198,716,910,840.56/215,988
6. Step 6: Final answer
   x = 920,036.81