Finding the Third Proportional to 99,654 and 215,040

Step by Step Solution

1. Step 1: Write the proportion equation
   99,654 : 215,040 = 215,040 : x
2. Step 2: Convert to fraction form
   99,654/215,040 = 215,040/x
3. Step 3: Cross multiply
   99,654x = 215,040 × 215,040
4. Step 4: Simplify right side
   99,654x = 46,242,201,600
5. Step 5: Solve for x
   x = 46,242,201,600/99,654
6. Step 6: Final answer
   x = 464,027.55