Finding the Third Proportional to 86,672.50 and 137,905

Step by Step Solution

1. Step 1: Write the proportion equation
   86,672.50 : 137,905 = 137,905 : x
2. Step 2: Convert to fraction form
   86,672.50/137,905 = 137,905/x
3. Step 3: Cross multiply
   86,672.50x = 137,905 × 137,905
4. Step 4: Simplify right side
   86,672.50x = 19,017,789,025
5. Step 5: Solve for x
   x = 19,017,789,025/86,672.50
6. Step 6: Final answer
   x = 219,421.26