Finding the Fourth Proportional to 120,216.83, 165,847.10 and 72,443.03

Step by Step Solution

1. Step 1: Write the proportion equation
   120,216.83 : 165,847.10 = 72,443.03 : x
2. Step 2: Convert to fraction form
   120,216.83/165,847.10 = 72,443.03/x
3. Step 3: Cross multiply
   120,216.83x = 165,847.10 × 72,443.03
4. Step 4: Simplify right side
   120,216.83x = 12,014,465,249.26
5. Step 5: Solve for x
   x = 12,014,465,249.26/120,216.83
6. Step 6: Final answer
   x = 99,939.96