Finding the Third Proportional to 92,859 and 139,287.50

Step by Step Solution

1. Step 1: Write the proportion equation
   92,859 : 139,287.50 = 139,287.50 : x
2. Step 2: Convert to fraction form
   92,859/139,287.50 = 139,287.50/x
3. Step 3: Cross multiply
   92,859x = 139,287.50 × 139,287.50
4. Step 4: Simplify right side
   92,859x = 19,401,007,656.25
5. Step 5: Solve for x
   x = 19,401,007,656.25/92,859
6. Step 6: Final answer
   x = 208,929.75