Finding the Fourth Proportional to 538,123.50, 742,610.43 and 311,900.22

Step by Step Solution

1. Step 1: Write the proportion equation
   538,123.50 : 742,610.43 = 311,900.22 : x
2. Step 2: Convert to fraction form
   538,123.50/742,610.43 = 311,900.22/x
3. Step 3: Cross multiply
   538,123.50x = 742,610.43 × 311,900.22
4. Step 4: Simplify right side
   538,123.50x = 231,620,356,491.30
5. Step 5: Solve for x
   x = 231,620,356,491.30/538,123.50
6. Step 6: Final answer
   x = 430,422.30