Finding the Fourth Proportional to 881,280, 1,216,166.40 and 478,872

Step by Step Solution

1. Step 1: Write the proportion equation
   881,280 : 1,216,166.40 = 478,872 : x
2. Step 2: Convert to fraction form
   881,280/1,216,166.40 = 478,872/x
3. Step 3: Cross multiply
   881,280x = 1,216,166.40 × 478,872
4. Step 4: Simplify right side
   881,280x = 582,388,036,300.80
5. Step 5: Solve for x
   x = 582,388,036,300.80/881,280
6. Step 6: Final answer
   x = 660,843.36