Finding the Fourth Proportional to 10,483.89, 15,729.62 and 5,285.85

Step by Step Solution

1. Step 1: Write the proportion equation
   10,483.89 : 15,729.62 = 5,285.85 : x
2. Step 2: Convert to fraction form
   10,483.89/15,729.62 = 5,285.85/x
3. Step 3: Cross multiply
   10,483.89x = 15,729.62 × 5,285.85
4. Step 4: Simplify right side
   10,483.89x = 83,144,385.45
5. Step 5: Solve for x
   x = 83,144,385.45/10,483.89
6. Step 6: Final answer
   x = 7,930.68