Finding the Fourth Proportional to 120,353.49, 166,093.52 and 72,605.81

Step by Step Solution

1. Step 1: Write the proportion equation
   120,353.49 : 166,093.52 = 72,605.81 : x
2. Step 2: Convert to fraction form
   120,353.49/166,093.52 = 72,605.81/x
3. Step 3: Cross multiply
   120,353.49x = 166,093.52 × 72,605.81
4. Step 4: Simplify right side
   120,353.49x = 12,059,355,152.10
5. Step 5: Solve for x
   x = 12,059,355,152.10/120,353.49
6. Step 6: Final answer
   x = 100,199.46