Finding the Fourth Proportional to 289,061.84, 433,605.72 and 126,945.20

Step by Step Solution

1. Step 1: Write the proportion equation
   289,061.84 : 433,605.72 = 126,945.20 : x
2. Step 2: Convert to fraction form
   289,061.84/433,605.72 = 126,945.20/x
3. Step 3: Cross multiply
   289,061.84x = 433,605.72 × 126,945.20
4. Step 4: Simplify right side
   289,061.84x = 55,044,164,846.54
5. Step 5: Solve for x
   x = 55,044,164,846.54/289,061.84
6. Step 6: Final answer
   x = 190,423.49