Finding the Third Proportional to 91,920 and 189,600

Step by Step Solution

1. Step 1: Write the proportion equation
   91,920 : 189,600 = 189,600 : x
2. Step 2: Convert to fraction form
   91,920/189,600 = 189,600/x
3. Step 3: Cross multiply
   91,920x = 189,600 × 189,600
4. Step 4: Simplify right side
   91,920x = 35,948,160,000
5. Step 5: Solve for x
   x = 35,948,160,000/91,920
6. Step 6: Final answer
   x = 391,080.94