Finding the Third Proportional to 40,680.56 and 84,435.75

Step by Step Solution

1. Step 1: Write the proportion equation
   40,680.56 : 84,435.75 = 84,435.75 : x
2. Step 2: Convert to fraction form
   40,680.56/84,435.75 = 84,435.75/x
3. Step 3: Cross multiply
   40,680.56x = 84,435.75 × 84,435.75
4. Step 4: Simplify right side
   40,680.56x = 7,129,395,878.06
5. Step 5: Solve for x
   x = 7,129,395,878.06/40,680.56
6. Step 6: Final answer
   x = 175,253.13