Finding the Third Proportional to 56,891.25 and 87,709.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,891.25 : 87,709.50 = 87,709.50 : x
2. Step 2: Convert to fraction form
   56,891.25/87,709.50 = 87,709.50/x
3. Step 3: Cross multiply
   56,891.25x = 87,709.50 × 87,709.50
4. Step 4: Simplify right side
   56,891.25x = 7,692,956,390.25
5. Step 5: Solve for x
   x = 7,692,956,390.25/56,891.25
6. Step 6: Final answer
   x = 135,222.14