Finding the Fourth Proportional to 282,931.81, 424,391.57 and 133,089.05

Step by Step Solution

1. Step 1: Write the proportion equation
   282,931.81 : 424,391.57 = 133,089.05 : x
2. Step 2: Convert to fraction form
   282,931.81/424,391.57 = 133,089.05/x
3. Step 3: Cross multiply
   282,931.81x = 424,391.57 × 133,089.05
4. Step 4: Simplify right side
   282,931.81x = 56,481,870,879.31
5. Step 5: Solve for x
   x = 56,481,870,879.31/282,931.81
6. Step 6: Final answer
   x = 199,630.68