Finding the Third Proportional to 139,742.50 and 301,617

Step by Step Solution

1. Step 1: Write the proportion equation
   139,742.50 : 301,617 = 301,617 : x
2. Step 2: Convert to fraction form
   139,742.50/301,617 = 301,617/x
3. Step 3: Cross multiply
   139,742.50x = 301,617 × 301,617
4. Step 4: Simplify right side
   139,742.50x = 90,972,814,689
5. Step 5: Solve for x
   x = 90,972,814,689/139,742.50
6. Step 6: Final answer
   x = 651,003.20