Finding the Third Proportional to 91,155.38 and 198,758.81

Step by Step Solution

1. Step 1: Write the proportion equation
   91,155.38 : 198,758.81 = 198,758.81 : x
2. Step 2: Convert to fraction form
   91,155.38/198,758.81 = 198,758.81/x
3. Step 3: Cross multiply
   91,155.38x = 198,758.81 × 198,758.81
4. Step 4: Simplify right side
   91,155.38x = 39,505,065,546.41
5. Step 5: Solve for x
   x = 39,505,065,546.41/91,155.38
6. Step 6: Final answer
   x = 433,381.64