Finding the Fourth Proportional to 120,238.40, 165,876 and 72,463.52

Step by Step Solution

1. Step 1: Write the proportion equation
   120,238.40 : 165,876 = 72,463.52 : x
2. Step 2: Convert to fraction form
   120,238.40/165,876 = 72,463.52/x
3. Step 3: Cross multiply
   120,238.40x = 165,876 × 72,463.52
4. Step 4: Simplify right side
   120,238.40x = 12,019,958,843.52
5. Step 5: Solve for x
   x = 12,019,958,843.52/120,238.40
6. Step 6: Final answer
   x = 99,967.72