Finding the Third Proportional to 62,590.50 and 139,174.50

Step by Step Solution

1. Step 1: Write the proportion equation
   62,590.50 : 139,174.50 = 139,174.50 : x
2. Step 2: Convert to fraction form
   62,590.50/139,174.50 = 139,174.50/x
3. Step 3: Cross multiply
   62,590.50x = 139,174.50 × 139,174.50
4. Step 4: Simplify right side
   62,590.50x = 19,369,541,450.25
5. Step 5: Solve for x
   x = 19,369,541,450.25/62,590.50
6. Step 6: Final answer
   x = 309,464.56