Finding the Third Proportional to 55,615.50 and 86,188.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,615.50 : 86,188.50 = 86,188.50 : x
2. Step 2: Convert to fraction form
   55,615.50/86,188.50 = 86,188.50/x
3. Step 3: Cross multiply
   55,615.50x = 86,188.50 × 86,188.50
4. Step 4: Simplify right side
   55,615.50x = 7,428,457,532.25
5. Step 5: Solve for x
   x = 7,428,457,532.25/55,615.50
6. Step 6: Final answer
   x = 133,568.12