Finding the Fourth Proportional to 389,362.50, 537,321.06 and 210,514.50

Step by Step Solution

1. Step 1: Write the proportion equation
   389,362.50 : 537,321.06 = 210,514.50 : x
2. Step 2: Convert to fraction form
   389,362.50/537,321.06 = 210,514.50/x
3. Step 3: Cross multiply
   389,362.50x = 537,321.06 × 210,514.50
4. Step 4: Simplify right side
   389,362.50x = 113,113,874,285.37
5. Step 5: Solve for x
   x = 113,113,874,285.37/389,362.50
6. Step 6: Final answer
   x = 290,510.45