Finding the Third Proportional to 55,235.25 and 86,406.75

Step by Step Solution

1. Step 1: Write the proportion equation
   55,235.25 : 86,406.75 = 86,406.75 : x
2. Step 2: Convert to fraction form
   55,235.25/86,406.75 = 86,406.75/x
3. Step 3: Cross multiply
   55,235.25x = 86,406.75 × 86,406.75
4. Step 4: Simplify right side
   55,235.25x = 7,466,126,445.56
5. Step 5: Solve for x
   x = 7,466,126,445.56/55,235.25
6. Step 6: Final answer
   x = 135,169.60