Finding the Fourth Proportional to 538,856.69, 807,846.69 and 201,708.50

Step by Step Solution

1. Step 1: Write the proportion equation
   538,856.69 : 807,846.69 = 201,708.50 : x
2. Step 2: Convert to fraction form
   538,856.69/807,846.69 = 201,708.50/x
3. Step 3: Cross multiply
   538,856.69x = 807,846.69 × 201,708.50
4. Step 4: Simplify right side
   538,856.69x = 162,949,544,069.87
5. Step 5: Solve for x
   x = 162,949,544,069.87/538,856.69
6. Step 6: Final answer
   x = 302,398.67