Finding the Third Proportional to 83,980.75 and 128,411.25

Step by Step Solution

1. Step 1: Write the proportion equation
   83,980.75 : 128,411.25 = 128,411.25 : x
2. Step 2: Convert to fraction form
   83,980.75/128,411.25 = 128,411.25/x
3. Step 3: Cross multiply
   83,980.75x = 128,411.25 × 128,411.25
4. Step 4: Simplify right side
   83,980.75x = 16,489,449,126.56
5. Step 5: Solve for x
   x = 16,489,449,126.56/83,980.75
6. Step 6: Final answer
   x = 196,347.96