Finding the Fourth Proportional to 317,100.05, 437,618.33 and 209,481.42

Step by Step Solution

1. Step 1: Write the proportion equation
   317,100.05 : 437,618.33 = 209,481.42 : x
2. Step 2: Convert to fraction form
   317,100.05/437,618.33 = 209,481.42/x
3. Step 3: Cross multiply
   317,100.05x = 437,618.33 × 209,481.42
4. Step 4: Simplify right side
   317,100.05x = 91,672,908,139.02
5. Step 5: Solve for x
   x = 91,672,908,139.02/317,100.05
6. Step 6: Final answer
   x = 289,097.75