Finding the Fourth Proportional to 538,112, 742,594.56 and 311,888.72

Step by Step Solution

1. Step 1: Write the proportion equation
   538,112 : 742,594.56 = 311,888.72 : x
2. Step 2: Convert to fraction form
   538,112/742,594.56 = 311,888.72/x
3. Step 3: Cross multiply
   538,112x = 742,594.56 × 311,888.72
4. Step 4: Simplify right side
   538,112x = 231,606,866,797.36
5. Step 5: Solve for x
   x = 231,606,866,797.36/538,112
6. Step 6: Final answer
   x = 430,406.43