Finding the Third Proportional to 60,879 and 139,813.50

Step by Step Solution

1. Step 1: Write the proportion equation
   60,879 : 139,813.50 = 139,813.50 : x
2. Step 2: Convert to fraction form
   60,879/139,813.50 = 139,813.50/x
3. Step 3: Cross multiply
   60,879x = 139,813.50 × 139,813.50
4. Step 4: Simplify right side
   60,879x = 19,547,814,782.25
5. Step 5: Solve for x
   x = 19,547,814,782.25/60,879
6. Step 6: Final answer
   x = 321,092.90