Finding the Third Proportional to 64,543.50 and 139,809.38

Step by Step Solution

1. Step 1: Write the proportion equation
   64,543.50 : 139,809.38 = 139,809.38 : x
2. Step 2: Convert to fraction form
   64,543.50/139,809.38 = 139,809.38/x
3. Step 3: Cross multiply
   64,543.50x = 139,809.38 × 139,809.38
4. Step 4: Simplify right side
   64,543.50x = 19,546,661,337.89
5. Step 5: Solve for x
   x = 19,546,661,337.89/64,543.50
6. Step 6: Final answer
   x = 302,844.77