Finding the Third Proportional to 67,980.50 and 109,442.50

Step by Step Solution

1. Step 1: Write the proportion equation
   67,980.50 : 109,442.50 = 109,442.50 : x
2. Step 2: Convert to fraction form
   67,980.50/109,442.50 = 109,442.50/x
3. Step 3: Cross multiply
   67,980.50x = 109,442.50 × 109,442.50
4. Step 4: Simplify right side
   67,980.50x = 11,977,660,806.25
5. Step 5: Solve for x
   x = 11,977,660,806.25/67,980.50
6. Step 6: Final answer
   x = 176,192.60