Finding the Fourth Proportional to 457,200.72, 685,468.80 and 191,037.42

Step by Step Solution

1. Step 1: Write the proportion equation
   457,200.72 : 685,468.80 = 191,037.42 : x
2. Step 2: Convert to fraction form
   457,200.72/685,468.80 = 191,037.42/x
3. Step 3: Cross multiply
   457,200.72x = 685,468.80 × 191,037.42
4. Step 4: Simplify right side
   457,200.72x = 130,950,191,042.50
5. Step 5: Solve for x
   x = 130,950,191,042.50/457,200.72
6. Step 6: Final answer
   x = 286,417.29