Finding the Third Proportional to 78,799.50 and 117,920.81

Step by Step Solution

1. Step 1: Write the proportion equation
   78,799.50 : 117,920.81 = 117,920.81 : x
2. Step 2: Convert to fraction form
   78,799.50/117,920.81 = 117,920.81/x
3. Step 3: Cross multiply
   78,799.50x = 117,920.81 × 117,920.81
4. Step 4: Simplify right side
   78,799.50x = 13,905,318,020.66
5. Step 5: Solve for x
   x = 13,905,318,020.66/78,799.50
6. Step 6: Final answer
   x = 176,464.55