Finding the Third Proportional to 83,607 and 129,510.50

Step by Step Solution

1. Step 1: Write the proportion equation
   83,607 : 129,510.50 = 129,510.50 : x
2. Step 2: Convert to fraction form
   83,607/129,510.50 = 129,510.50/x
3. Step 3: Cross multiply
   83,607x = 129,510.50 × 129,510.50
4. Step 4: Simplify right side
   83,607x = 16,772,969,610.25
5. Step 5: Solve for x
   x = 16,772,969,610.25/83,607
6. Step 6: Final answer
   x = 200,616.81