Finding the Third Proportional to 90,420 and 133,786

Step by Step Solution

1. Step 1: Write the proportion equation
   90,420 : 133,786 = 133,786 : x
2. Step 2: Convert to fraction form
   90,420/133,786 = 133,786/x
3. Step 3: Cross multiply
   90,420x = 133,786 × 133,786
4. Step 4: Simplify right side
   90,420x = 17,898,693,796
5. Step 5: Solve for x
   x = 17,898,693,796/90,420
6. Step 6: Final answer
   x = 197,950.61