Finding the Fourth Proportional to 389,945, 538,124.82 and 211,097

Step by Step Solution

1. Step 1: Write the proportion equation
   389,945 : 538,124.82 = 211,097 : x
2. Step 2: Convert to fraction form
   389,945/538,124.82 = 211,097/x
3. Step 3: Cross multiply
   389,945x = 538,124.82 × 211,097
4. Step 4: Simplify right side
   389,945x = 113,596,535,127.54
5. Step 5: Solve for x
   x = 113,596,535,127.54/389,945
6. Step 6: Final answer
   x = 291,314.25