Finding the Fourth Proportional to 120,620.17, 166,453.27 and 74,667.57

Step by Step Solution

1. Step 1: Write the proportion equation
   120,620.17 : 166,453.27 = 74,667.57 : x
2. Step 2: Convert to fraction form
   120,620.17/166,453.27 = 74,667.57/x
3. Step 3: Cross multiply
   120,620.17x = 166,453.27 × 74,667.57
4. Step 4: Simplify right side
   120,620.17x = 12,428,661,189.45
5. Step 5: Solve for x
   x = 12,428,661,189.45/120,620.17
6. Step 6: Final answer
   x = 103,039.66