Finding the Fourth Proportional to 538,164, 742,666.50 and 311,940.72

Step by Step Solution

1. Step 1: Write the proportion equation
   538,164 : 742,666.50 = 311,940.72 : x
2. Step 2: Convert to fraction form
   538,164/742,666.50 = 311,940.72/x
3. Step 3: Cross multiply
   538,164x = 742,666.50 × 311,940.72
4. Step 4: Simplify right side
   538,164x = 231,667,922,729.88
5. Step 5: Solve for x
   x = 231,667,922,729.88/538,164
6. Step 6: Final answer
   x = 430,478.30