Finding the Fourth Proportional to 726,147.72, 1,089,074.16 and 456,155.28

Step by Step Solution

1. Step 1: Write the proportion equation
   726,147.72 : 1,089,074.16 = 456,155.28 : x
2. Step 2: Convert to fraction form
   726,147.72/1,089,074.16 = 456,155.28/x
3. Step 3: Cross multiply
   726,147.72x = 1,089,074.16 × 456,155.28
4. Step 4: Simplify right side
   726,147.72x = 496,786,928,395.57
5. Step 5: Solve for x
   x = 496,786,928,395.57/726,147.72
6. Step 6: Final answer
   x = 684,140.31