Finding the Fourth Proportional to 978,408.24, 1,470,411.72 and 480,122.16

Step by Step Solution

1. Step 1: Write the proportion equation
   978,408.24 : 1,470,411.72 = 480,122.16 : x
2. Step 2: Convert to fraction form
   978,408.24/1,470,411.72 = 480,122.16/x
3. Step 3: Cross multiply
   978,408.24x = 1,470,411.72 × 480,122.16
4. Step 4: Simplify right side
   978,408.24x = 705,977,251,095.72
5. Step 5: Solve for x
   x = 705,977,251,095.72/978,408.24
6. Step 6: Final answer
   x = 721,556.94