Finding the Fourth Proportional to 120,404.40, 166,164.08 and 72,656.96

Step by Step Solution

1. Step 1: Write the proportion equation
   120,404.40 : 166,164.08 = 72,656.96 : x
2. Step 2: Convert to fraction form
   120,404.40/166,164.08 = 72,656.96/x
3. Step 3: Cross multiply
   120,404.40x = 166,164.08 × 72,656.96
4. Step 4: Simplify right side
   120,404.40x = 12,072,976,914.00
5. Step 5: Solve for x
   x = 12,072,976,914.00/120,404.40
6. Step 6: Final answer
   x = 100,270.23