Finding the Fourth Proportional to 389,327, 537,271.98 and 210,479

Step by Step Solution

1. Step 1: Write the proportion equation
   389,327 : 537,271.98 = 210,479 : x
2. Step 2: Convert to fraction form
   389,327/537,271.98 = 210,479/x
3. Step 3: Cross multiply
   389,327x = 537,271.98 × 210,479
4. Step 4: Simplify right side
   389,327x = 113,084,469,078.42
5. Step 5: Solve for x
   x = 113,084,469,078.42/389,327
6. Step 6: Final answer
   x = 290,461.41