Finding the Third Proportional to 42,543.50 and 91,405

Step by Step Solution

1. Step 1: Write the proportion equation
   42,543.50 : 91,405 = 91,405 : x
2. Step 2: Convert to fraction form
   42,543.50/91,405 = 91,405/x
3. Step 3: Cross multiply
   42,543.50x = 91,405 × 91,405
4. Step 4: Simplify right side
   42,543.50x = 8,354,874,025
5. Step 5: Solve for x
   x = 8,354,874,025/42,543.50
6. Step 6: Final answer
   x = 196,384.27