Finding the Fourth Proportional to 389,007, 536,829.72 and 210,159

Step by Step Solution

1. Step 1: Write the proportion equation
   389,007 : 536,829.72 = 210,159 : x
2. Step 2: Convert to fraction form
   389,007/536,829.72 = 210,159/x
3. Step 3: Cross multiply
   389,007x = 536,829.72 × 210,159
4. Step 4: Simplify right side
   389,007x = 112,819,597,125.48
5. Step 5: Solve for x
   x = 112,819,597,125.48/389,007
6. Step 6: Final answer
   x = 290,019.45