Finding the Third Proportional to 64,692 and 139,225.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,692 : 139,225.50 = 139,225.50 : x
2. Step 2: Convert to fraction form
   64,692/139,225.50 = 139,225.50/x
3. Step 3: Cross multiply
   64,692x = 139,225.50 × 139,225.50
4. Step 4: Simplify right side
   64,692x = 19,383,739,850.25
5. Step 5: Solve for x
   x = 19,383,739,850.25/64,692
6. Step 6: Final answer
   x = 299,631.17