Finding the Fourth Proportional to 120,564.24, 166,351.72 and 72,158.64

Step by Step Solution

1. Step 1: Write the proportion equation
   120,564.24 : 166,351.72 = 72,158.64 : x
2. Step 2: Convert to fraction form
   120,564.24/166,351.72 = 72,158.64/x
3. Step 3: Cross multiply
   120,564.24x = 166,351.72 × 72,158.64
4. Step 4: Simplify right side
   120,564.24x = 12,003,713,876.86
5. Step 5: Solve for x
   x = 12,003,713,876.86/120,564.24
6. Step 6: Final answer
   x = 99,562.80