Finding the Fourth Proportional to 361,401.28, 541,996.50 and 121,488.07

Step by Step Solution

1. Step 1: Write the proportion equation
   361,401.28 : 541,996.50 = 121,488.07 : x
2. Step 2: Convert to fraction form
   361,401.28/541,996.50 = 121,488.07/x
3. Step 3: Cross multiply
   361,401.28x = 541,996.50 × 121,488.07
4. Step 4: Simplify right side
   361,401.28x = 65,846,105,414.33
5. Step 5: Solve for x
   x = 65,846,105,414.33/361,401.28
6. Step 6: Final answer
   x = 182,196.66