Finding the Fourth Proportional to 216,109.67, 298,259.55 and 120,636.18

Step by Step Solution

1. Step 1: Write the proportion equation
   216,109.67 : 298,259.55 = 120,636.18 : x
2. Step 2: Convert to fraction form
   216,109.67/298,259.55 = 120,636.18/x
3. Step 3: Cross multiply
   216,109.67x = 298,259.55 × 120,636.18
4. Step 4: Simplify right side
   216,109.67x = 35,980,892,760.52
5. Step 5: Solve for x
   x = 35,980,892,760.52/216,109.67
6. Step 6: Final answer
   x = 166,493.68