Finding the Third Proportional to 56,517.50 and 87,374.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,517.50 : 87,374.50 = 87,374.50 : x
2. Step 2: Convert to fraction form
   56,517.50/87,374.50 = 87,374.50/x
3. Step 3: Cross multiply
   56,517.50x = 87,374.50 × 87,374.50
4. Step 4: Simplify right side
   56,517.50x = 7,634,303,250.25
5. Step 5: Solve for x
   x = 7,634,303,250.25/56,517.50
6. Step 6: Final answer
   x = 135,078.57