Finding the Fourth Proportional to 389,443.50, 537,432.06 and 210,595.50

Step by Step Solution

1. Step 1: Write the proportion equation
   389,443.50 : 537,432.06 = 210,595.50 : x
2. Step 2: Convert to fraction form
   389,443.50/537,432.06 = 210,595.50/x
3. Step 3: Cross multiply
   389,443.50x = 537,432.06 × 210,595.50
4. Step 4: Simplify right side
   389,443.50x = 113,180,773,391.73
5. Step 5: Solve for x
   x = 113,180,773,391.73/389,443.50
6. Step 6: Final answer
   x = 290,621.81