Finding the Third Proportional to 55,615 and 86,187.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,615 : 86,187.50 = 86,187.50 : x
2. Step 2: Convert to fraction form
   55,615/86,187.50 = 86,187.50/x
3. Step 3: Cross multiply
   55,615x = 86,187.50 × 86,187.50
4. Step 4: Simplify right side
   55,615x = 7,428,285,156.25
5. Step 5: Solve for x
   x = 7,428,285,156.25/55,615
6. Step 6: Final answer
   x = 133,566.22