Finding the Third Proportional to 99,134,940 and 215,907,288

Step by Step Solution

1. Step 1: Write the proportion equation
   99,134,940 : 215,907,288 = 215,907,288 : x
2. Step 2: Convert to fraction form
   99,134,940/215,907,288 = 215,907,288/x
3. Step 3: Cross multiply
   99,134,940x = 215,907,288 × 215,907,288
4. Step 4: Simplify right side
   99,134,940x = 46,615,957,011,514,944
5. Step 5: Solve for x
   x = 46,615,957,011,514,944/99,134,940
6. Step 6: Final answer
   x = 470,227,318.56