Finding the Third Proportional to 132,156 and 212,791.50

Step by Step Solution

1. Step 1: Write the proportion equation
   132,156 : 212,791.50 = 212,791.50 : x
2. Step 2: Convert to fraction form
   132,156/212,791.50 = 212,791.50/x
3. Step 3: Cross multiply
   132,156x = 212,791.50 × 212,791.50
4. Step 4: Simplify right side
   132,156x = 45,280,222,472.25
5. Step 5: Solve for x
   x = 45,280,222,472.25/132,156
6. Step 6: Final answer
   x = 342,627.07