Finding the Fourth Proportional to 389,793.72, 537,915.42 and 210,945.72

Step by Step Solution

1. Step 1: Write the proportion equation
   389,793.72 : 537,915.42 = 210,945.72 : x
2. Step 2: Convert to fraction form
   389,793.72/537,915.42 = 210,945.72/x
3. Step 3: Cross multiply
   389,793.72x = 537,915.42 × 210,945.72
4. Step 4: Simplify right side
   389,793.72x = 113,470,955,571.00
5. Step 5: Solve for x
   x = 113,470,955,571.00/389,793.72
6. Step 6: Final answer
   x = 291,105.14