Finding the Third Proportional to 29,989 and 64,591.50

Step by Step Solution

1. Step 1: Write the proportion equation
   29,989 : 64,591.50 = 64,591.50 : x
2. Step 2: Convert to fraction form
   29,989/64,591.50 = 64,591.50/x
3. Step 3: Cross multiply
   29,989x = 64,591.50 × 64,591.50
4. Step 4: Simplify right side
   29,989x = 4,172,061,872.25
5. Step 5: Solve for x
   x = 4,172,061,872.25/29,989
6. Step 6: Final answer
   x = 139,119.74