Finding the Third Proportional to 91,990.69 and 171,337.78

Step by Step Solution

1. Step 1: Write the proportion equation
   91,990.69 : 171,337.78 = 171,337.78 : x
2. Step 2: Convert to fraction form
   91,990.69/171,337.78 = 171,337.78/x
3. Step 3: Cross multiply
   91,990.69x = 171,337.78 × 171,337.78
4. Step 4: Simplify right side
   91,990.69x = 29,356,635,283.67
5. Step 5: Solve for x
   x = 29,356,635,283.67/91,990.69
6. Step 6: Final answer
   x = 319,126.16