Finding the Fourth Proportional to 216,166.50, 298,308.69 and 120,667.50

Step by Step Solution

1. Step 1: Write the proportion equation
   216,166.50 : 298,308.69 = 120,667.50 : x
2. Step 2: Convert to fraction form
   216,166.50/298,308.69 = 120,667.50/x
3. Step 3: Cross multiply
   216,166.50x = 298,308.69 × 120,667.50
4. Step 4: Simplify right side
   216,166.50x = 35,996,163,850.58
5. Step 5: Solve for x
   x = 35,996,163,850.58/216,166.50
6. Step 6: Final answer
   x = 166,520.55