Finding the Fourth Proportional to 389,018.72, 536,845.92 and 210,170.72

Step by Step Solution

1. Step 1: Write the proportion equation
   389,018.72 : 536,845.92 = 210,170.72 : x
2. Step 2: Convert to fraction form
   389,018.72/536,845.92 = 210,170.72/x
3. Step 3: Cross multiply
   389,018.72x = 536,845.92 × 210,170.72
4. Step 4: Simplify right side
   389,018.72x = 112,829,293,535.46
5. Step 5: Solve for x
   x = 112,829,293,535.46/389,018.72
6. Step 6: Final answer
   x = 290,035.64