Finding the Third Proportional to 129,829.50 and 287,838

Step by Step Solution

1. Step 1: Write the proportion equation
   129,829.50 : 287,838 = 287,838 : x
2. Step 2: Convert to fraction form
   129,829.50/287,838 = 287,838/x
3. Step 3: Cross multiply
   129,829.50x = 287,838 × 287,838
4. Step 4: Simplify right side
   129,829.50x = 82,850,714,244
5. Step 5: Solve for x
   x = 82,850,714,244/129,829.50
6. Step 6: Final answer
   x = 638,150.14