Finding the Third Proportional to 91,159 and 139,930

Step by Step Solution

1. Step 1: Write the proportion equation
   91,159 : 139,930 = 139,930 : x
2. Step 2: Convert to fraction form
   91,159/139,930 = 139,930/x
3. Step 3: Cross multiply
   91,159x = 139,930 × 139,930
4. Step 4: Simplify right side
   91,159x = 19,580,404,900
5. Step 5: Solve for x
   x = 19,580,404,900/91,159
6. Step 6: Final answer
   x = 214,793.99