Finding the Fourth Proportional to 72,177.86, 99,603.69 and 40,350.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,177.86 : 99,603.69 = 40,350.50 : x
2. Step 2: Convert to fraction form
   72,177.86/99,603.69 = 40,350.50/x
3. Step 3: Cross multiply
   72,177.86x = 99,603.69 × 40,350.50
4. Step 4: Simplify right side
   72,177.86x = 4,019,058,693.35
5. Step 5: Solve for x
   x = 4,019,058,693.35/72,177.86
6. Step 6: Final answer
   x = 55,682.71