Finding the Third Proportional to 132,815.50 and 285,314.50

Step by Step Solution

1. Step 1: Write the proportion equation
   132,815.50 : 285,314.50 = 285,314.50 : x
2. Step 2: Convert to fraction form
   132,815.50/285,314.50 = 285,314.50/x
3. Step 3: Cross multiply
   132,815.50x = 285,314.50 × 285,314.50
4. Step 4: Simplify right side
   132,815.50x = 81,404,363,910.25
5. Step 5: Solve for x
   x = 81,404,363,910.25/132,815.50
6. Step 6: Final answer
   x = 612,913.13