Finding the Third Proportional to 78,900 and 110,979

Step by Step Solution

1. Step 1: Write the proportion equation
   78,900 : 110,979 = 110,979 : x
2. Step 2: Convert to fraction form
   78,900/110,979 = 110,979/x
3. Step 3: Cross multiply
   78,900x = 110,979 × 110,979
4. Step 4: Simplify right side
   78,900x = 12,316,338,441
5. Step 5: Solve for x
   x = 12,316,338,441/78,900
6. Step 6: Final answer
   x = 156,100.61