Finding the Third Proportional to 42,239 and 91,780

Step by Step Solution

1. Step 1: Write the proportion equation
   42,239 : 91,780 = 91,780 : x
2. Step 2: Convert to fraction form
   42,239/91,780 = 91,780/x
3. Step 3: Cross multiply
   42,239x = 91,780 × 91,780
4. Step 4: Simplify right side
   42,239x = 8,423,568,400
5. Step 5: Solve for x
   x = 8,423,568,400/42,239
6. Step 6: Final answer
   x = 199,426.32