Finding the Third Proportional to 62,589.38 and 139,172.63

Step by Step Solution

1. Step 1: Write the proportion equation
   62,589.38 : 139,172.63 = 139,172.63 : x
2. Step 2: Convert to fraction form
   62,589.38/139,172.63 = 139,172.63/x
3. Step 3: Cross multiply
   62,589.38x = 139,172.63 × 139,172.63
4. Step 4: Simplify right side
   62,589.38x = 19,369,019,549.39
5. Step 5: Solve for x
   x = 19,369,019,549.39/62,589.38
6. Step 6: Final answer
   x = 309,461.78