Finding the Fourth Proportional to 800,880.72, 1,105,106.31 and 478,522.68

Step by Step Solution

1. Step 1: Write the proportion equation
   800,880.72 : 1,105,106.31 = 478,522.68 : x
2. Step 2: Convert to fraction form
   800,880.72/1,105,106.31 = 478,522.68/x
3. Step 3: Cross multiply
   800,880.72x = 1,105,106.31 × 478,522.68
4. Step 4: Simplify right side
   800,880.72x = 528,818,433,146.11
5. Step 5: Solve for x
   x = 528,818,433,146.11/800,880.72
6. Step 6: Final answer
   x = 660,296.12