Finding the Fourth Proportional to 120,429.66, 166,168.98 and 72,685.62

Step by Step Solution

1. Step 1: Write the proportion equation
   120,429.66 : 166,168.98 = 72,685.62 : x
2. Step 2: Convert to fraction form
   120,429.66/166,168.98 = 72,685.62/x
3. Step 3: Cross multiply
   120,429.66x = 166,168.98 × 72,685.62
4. Step 4: Simplify right side
   120,429.66x = 12,078,095,336.07
5. Step 5: Solve for x
   x = 12,078,095,336.07/120,429.66
6. Step 6: Final answer
   x = 100,291.70