Finding the Third Proportional to 132,434.50 and 287,445

Step by Step Solution

1. Step 1: Write the proportion equation
   132,434.50 : 287,445 = 287,445 : x
2. Step 2: Convert to fraction form
   132,434.50/287,445 = 287,445/x
3. Step 3: Cross multiply
   132,434.50x = 287,445 × 287,445
4. Step 4: Simplify right side
   132,434.50x = 82,624,628,025
5. Step 5: Solve for x
   x = 82,624,628,025/132,434.50
6. Step 6: Final answer
   x = 623,890.51