Finding the Fourth Proportional to 216,021.82, 298,111.18 and 120,533.90

Step by Step Solution

1. Step 1: Write the proportion equation
   216,021.82 : 298,111.18 = 120,533.90 : x
2. Step 2: Convert to fraction form
   216,021.82/298,111.18 = 120,533.90/x
3. Step 3: Cross multiply
   216,021.82x = 298,111.18 × 120,533.90
4. Step 4: Simplify right side
   216,021.82x = 35,932,503,159.00
5. Step 5: Solve for x
   x = 35,932,503,159.00/216,021.82
6. Step 6: Final answer
   x = 166,337.38