Finding the Third Proportional to 79,214.50 and 176,139.50

Step by Step Solution

1. Step 1: Write the proportion equation
   79,214.50 : 176,139.50 = 176,139.50 : x
2. Step 2: Convert to fraction form
   79,214.50/176,139.50 = 176,139.50/x
3. Step 3: Cross multiply
   79,214.50x = 176,139.50 × 176,139.50
4. Step 4: Simplify right side
   79,214.50x = 31,025,123,460.25
5. Step 5: Solve for x
   x = 31,025,123,460.25/79,214.50
6. Step 6: Final answer
   x = 391,659.65