Finding the Fourth Proportional to 726,408, 1,089,443.52 and 276,968.16

Step by Step Solution

1. Step 1: Write the proportion equation
   726,408 : 1,089,443.52 = 276,968.16 : x
2. Step 2: Convert to fraction form
   726,408/1,089,443.52 = 276,968.16/x
3. Step 3: Cross multiply
   726,408x = 1,089,443.52 × 276,968.16
4. Step 4: Simplify right side
   726,408x = 301,741,167,158.32
5. Step 5: Solve for x
   x = 301,741,167,158.32/726,408
6. Step 6: Final answer
   x = 415,388.00