Finding the Third Proportional to 91,165.50 and 198,780

Step by Step Solution

1. Step 1: Write the proportion equation
   91,165.50 : 198,780 = 198,780 : x
2. Step 2: Convert to fraction form
   91,165.50/198,780 = 198,780/x
3. Step 3: Cross multiply
   91,165.50x = 198,780 × 198,780
4. Step 4: Simplify right side
   91,165.50x = 39,513,488,400
5. Step 5: Solve for x
   x = 39,513,488,400/91,165.50
6. Step 6: Final answer
   x = 433,425.89