Finding the Fourth Proportional to 538,227.76, 807,061.38 and 200,991.10

Step by Step Solution

1. Step 1: Write the proportion equation
   538,227.76 : 807,061.38 = 200,991.10 : x
2. Step 2: Convert to fraction form
   538,227.76/807,061.38 = 200,991.10/x
3. Step 3: Cross multiply
   538,227.76x = 807,061.38 × 200,991.10
4. Step 4: Simplify right side
   538,227.76x = 162,212,154,533.72
5. Step 5: Solve for x
   x = 162,212,154,533.72/538,227.76
6. Step 6: Final answer
   x = 301,381.99