Finding the Third Proportional to 132,939 and 287,005.50

Step by Step Solution

1. Step 1: Write the proportion equation
   132,939 : 287,005.50 = 287,005.50 : x
2. Step 2: Convert to fraction form
   132,939/287,005.50 = 287,005.50/x
3. Step 3: Cross multiply
   132,939x = 287,005.50 × 287,005.50
4. Step 4: Simplify right side
   132,939x = 82,372,157,030.25
5. Step 5: Solve for x
   x = 82,372,157,030.25/132,939
6. Step 6: Final answer
   x = 619,623.71