Finding the Fourth Proportional to 120,222.22, 165,912.72 and 72,490.96

Step by Step Solution

1. Step 1: Write the proportion equation
   120,222.22 : 165,912.72 = 72,490.96 : x
2. Step 2: Convert to fraction form
   120,222.22/165,912.72 = 72,490.96/x
3. Step 3: Cross multiply
   120,222.22x = 165,912.72 × 72,490.96
4. Step 4: Simplify right side
   120,222.22x = 12,027,172,349.01
5. Step 5: Solve for x
   x = 12,027,172,349.01/120,222.22
6. Step 6: Final answer
   x = 100,041.18