Finding the Third Proportional to 62,606.50 and 139,211

Step by Step Solution

1. Step 1: Write the proportion equation
   62,606.50 : 139,211 = 139,211 : x
2. Step 2: Convert to fraction form
   62,606.50/139,211 = 139,211/x
3. Step 3: Cross multiply
   62,606.50x = 139,211 × 139,211
4. Step 4: Simplify right side
   62,606.50x = 19,379,702,521
5. Step 5: Solve for x
   x = 19,379,702,521/62,606.50
6. Step 6: Final answer
   x = 309,547.77