Finding the Fourth Proportional to 120,704.29, 166,456.21 and 72,298.49

Step by Step Solution

1. Step 1: Write the proportion equation
   120,704.29 : 166,456.21 = 72,298.49 : x
2. Step 2: Convert to fraction form
   120,704.29/166,456.21 = 72,298.49/x
3. Step 3: Cross multiply
   120,704.29x = 166,456.21 × 72,298.49
4. Step 4: Simplify right side
   120,704.29x = 12,034,532,380.87
5. Step 5: Solve for x
   x = 12,034,532,380.87/120,704.29
6. Step 6: Final answer
   x = 99,702.61