Finding the Third Proportional to 55,486.50 and 84,612.75

Step by Step Solution

1. Step 1: Write the proportion equation
   55,486.50 : 84,612.75 = 84,612.75 : x
2. Step 2: Convert to fraction form
   55,486.50/84,612.75 = 84,612.75/x
3. Step 3: Cross multiply
   55,486.50x = 84,612.75 × 84,612.75
4. Step 4: Simplify right side
   55,486.50x = 7,159,317,462.56
5. Step 5: Solve for x
   x = 7,159,317,462.56/55,486.50
6. Step 6: Final answer
   x = 129,028.10