Finding the Third Proportional to 161,991 and 334,332.56

Step by Step Solution

1. Step 1: Write the proportion equation
   161,991 : 334,332.56 = 334,332.56 : x
2. Step 2: Convert to fraction form
   161,991/334,332.56 = 334,332.56/x
3. Step 3: Cross multiply
   161,991x = 334,332.56 × 334,332.56
4. Step 4: Simplify right side
   161,991x = 111,778,262,347.82
5. Step 5: Solve for x
   x = 111,778,262,347.82/161,991
6. Step 6: Final answer
   x = 690,027.61