Finding the Third Proportional to 78,918 and 111,003

Step by Step Solution

1. Step 1: Write the proportion equation
   78,918 : 111,003 = 111,003 : x
2. Step 2: Convert to fraction form
   78,918/111,003 = 111,003/x
3. Step 3: Cross multiply
   78,918x = 111,003 × 111,003
4. Step 4: Simplify right side
   78,918x = 12,321,666,009
5. Step 5: Solve for x
   x = 12,321,666,009/78,918
6. Step 6: Final answer
   x = 156,132.52