Finding the Fourth Proportional to 297,285.72, 445,996.71 and 128,834.33

Step by Step Solution

1. Step 1: Write the proportion equation
   297,285.72 : 445,996.71 = 128,834.33 : x
2. Step 2: Convert to fraction form
   297,285.72/445,996.71 = 128,834.33/x
3. Step 3: Cross multiply
   297,285.72x = 445,996.71 × 128,834.33
4. Step 4: Simplify right side
   297,285.72x = 57,459,685,085.07
5. Step 5: Solve for x
   x = 57,459,685,085.07/297,285.72
6. Step 6: Final answer
   x = 193,281.01