Finding the Third Proportional to 59,956.88 and 86,620.50

Step by Step Solution

1. Step 1: Write the proportion equation
   59,956.88 : 86,620.50 = 86,620.50 : x
2. Step 2: Convert to fraction form
   59,956.88/86,620.50 = 86,620.50/x
3. Step 3: Cross multiply
   59,956.88x = 86,620.50 × 86,620.50
4. Step 4: Simplify right side
   59,956.88x = 7,503,111,020.25
5. Step 5: Solve for x
   x = 7,503,111,020.25/59,956.88
6. Step 6: Final answer
   x = 125,141.80