Finding the Fourth Proportional to 216,142.43, 298,270.35 and 120,647.07

Step by Step Solution

1. Step 1: Write the proportion equation
   216,142.43 : 298,270.35 = 120,647.07 : x
2. Step 2: Convert to fraction form
   216,142.43/298,270.35 = 120,647.07/x
3. Step 3: Cross multiply
   216,142.43x = 298,270.35 × 120,647.07
4. Step 4: Simplify right side
   216,142.43x = 35,985,443,795.37
5. Step 5: Solve for x
   x = 35,985,443,795.37/216,142.43
6. Step 6: Final answer
   x = 166,489.50