Finding the Fourth Proportional to 10,779.89, 16,157.48 and 4,855.55

Step by Step Solution

1. Step 1: Write the proportion equation
   10,779.89 : 16,157.48 = 4,855.55 : x
2. Step 2: Convert to fraction form
   10,779.89/16,157.48 = 4,855.55/x
3. Step 3: Cross multiply
   10,779.89x = 16,157.48 × 4,855.55
4. Step 4: Simplify right side
   10,779.89x = 78,453,346.95
5. Step 5: Solve for x
   x = 78,453,346.95/10,779.89
6. Step 6: Final answer
   x = 7,277.75