Finding the Third Proportional to 40,603.50 and 55,311.75

Step by Step Solution

1. Step 1: Write the proportion equation
   40,603.50 : 55,311.75 = 55,311.75 : x
2. Step 2: Convert to fraction form
   40,603.50/55,311.75 = 55,311.75/x
3. Step 3: Cross multiply
   40,603.50x = 55,311.75 × 55,311.75
4. Step 4: Simplify right side
   40,603.50x = 3,059,389,688.06
5. Step 5: Solve for x
   x = 3,059,389,688.06/40,603.50
6. Step 6: Final answer
   x = 75,347.93