Finding the Third Proportional to 99,444 and 215,820

Step by Step Solution

1. Step 1: Write the proportion equation
   99,444 : 215,820 = 215,820 : x
2. Step 2: Convert to fraction form
   99,444/215,820 = 215,820/x
3. Step 3: Cross multiply
   99,444x = 215,820 × 215,820
4. Step 4: Simplify right side
   99,444x = 46,578,272,400
5. Step 5: Solve for x
   x = 46,578,272,400/99,444
6. Step 6: Final answer
   x = 468,386.96