Finding the Fourth Proportional to 19,880.89, 29,821.18 and 5,089.78

Step by Step Solution

1. Step 1: Write the proportion equation
   19,880.89 : 29,821.18 = 5,089.78 : x
2. Step 2: Convert to fraction form
   19,880.89/29,821.18 = 5,089.78/x
3. Step 3: Cross multiply
   19,880.89x = 29,821.18 × 5,089.78
4. Step 4: Simplify right side
   19,880.89x = 151,783,245.54
5. Step 5: Solve for x
   x = 151,783,245.54/19,880.89
6. Step 6: Final answer
   x = 7,634.63