Finding the Third Proportional to 64,570.50 and 139,863

Step by Step Solution

1. Step 1: Write the proportion equation
   64,570.50 : 139,863 = 139,863 : x
2. Step 2: Convert to fraction form
   64,570.50/139,863 = 139,863/x
3. Step 3: Cross multiply
   64,570.50x = 139,863 × 139,863
4. Step 4: Simplify right side
   64,570.50x = 19,561,658,769
5. Step 5: Solve for x
   x = 19,561,658,769/64,570.50
6. Step 6: Final answer
   x = 302,950.40