Finding the Third Proportional to 129,784.50 and 287,751

Step by Step Solution

1. Step 1: Write the proportion equation
   129,784.50 : 287,751 = 287,751 : x
2. Step 2: Convert to fraction form
   129,784.50/287,751 = 287,751/x
3. Step 3: Cross multiply
   129,784.50x = 287,751 × 287,751
4. Step 4: Simplify right side
   129,784.50x = 82,800,638,001
5. Step 5: Solve for x
   x = 82,800,638,001/129,784.50
6. Step 6: Final answer
   x = 637,985.57