Finding the Fourth Proportional to 738,168.72, 1,107,718.56 and 423,240.72

Step by Step Solution

1. Step 1: Write the proportion equation
   738,168.72 : 1,107,718.56 = 423,240.72 : x
2. Step 2: Convert to fraction form
   738,168.72/1,107,718.56 = 423,240.72/x
3. Step 3: Cross multiply
   738,168.72x = 1,107,718.56 × 423,240.72
4. Step 4: Simplify right side
   738,168.72x = 468,831,600,891.76
5. Step 5: Solve for x
   x = 468,831,600,891.76/738,168.72
6. Step 6: Final answer
   x = 635,127.97