Finding the Third Proportional to 39,840.50 and 55,835.75

Step by Step Solution

1. Step 1: Write the proportion equation
   39,840.50 : 55,835.75 = 55,835.75 : x
2. Step 2: Convert to fraction form
   39,840.50/55,835.75 = 55,835.75/x
3. Step 3: Cross multiply
   39,840.50x = 55,835.75 × 55,835.75
4. Step 4: Simplify right side
   39,840.50x = 3,117,630,978.06
5. Step 5: Solve for x
   x = 3,117,630,978.06/39,840.50
6. Step 6: Final answer
   x = 78,252.81