Finding the Third Proportional to 42,720 and 98,900

Step by Step Solution

1. Step 1: Write the proportion equation
   42,720 : 98,900 = 98,900 : x
2. Step 2: Convert to fraction form
   42,720/98,900 = 98,900/x
3. Step 3: Cross multiply
   42,720x = 98,900 × 98,900
4. Step 4: Simplify right side
   42,720x = 9,781,210,000
5. Step 5: Solve for x
   x = 9,781,210,000/42,720
6. Step 6: Final answer
   x = 228,960.91