Finding the Third Proportional to 59,987 and 138,873.50

Step by Step Solution

1. Step 1: Write the proportion equation
   59,987 : 138,873.50 = 138,873.50 : x
2. Step 2: Convert to fraction form
   59,987/138,873.50 = 138,873.50/x
3. Step 3: Cross multiply
   59,987x = 138,873.50 × 138,873.50
4. Step 4: Simplify right side
   59,987x = 19,285,849,002.25
5. Step 5: Solve for x
   x = 19,285,849,002.25/59,987
6. Step 6: Final answer
   x = 321,500.48