Finding the Third Proportional to 64,042.50 and 139,159

Step by Step Solution

1. Step 1: Write the proportion equation
   64,042.50 : 139,159 = 139,159 : x
2. Step 2: Convert to fraction form
   64,042.50/139,159 = 139,159/x
3. Step 3: Cross multiply
   64,042.50x = 139,159 × 139,159
4. Step 4: Simplify right side
   64,042.50x = 19,365,227,281
5. Step 5: Solve for x
   x = 19,365,227,281/64,042.50
6. Step 6: Final answer
   x = 302,380.88