Finding the Third Proportional to 83,718 and 129,485.25

Step by Step Solution

1. Step 1: Write the proportion equation
   83,718 : 129,485.25 = 129,485.25 : x
2. Step 2: Convert to fraction form
   83,718/129,485.25 = 129,485.25/x
3. Step 3: Cross multiply
   83,718x = 129,485.25 × 129,485.25
4. Step 4: Simplify right side
   83,718x = 16,766,429,967.56
5. Step 5: Solve for x
   x = 16,766,429,967.56/83,718
6. Step 6: Final answer
   x = 200,272.70