Finding the Fourth Proportional to 9,019.89, 13,530.57 and 2,779.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,019.89 : 13,530.57 = 2,779.91 : x
2. Step 2: Convert to fraction form
   9,019.89/13,530.57 = 2,779.91/x
3. Step 3: Cross multiply
   9,019.89x = 13,530.57 × 2,779.91
4. Step 4: Simplify right side
   9,019.89x = 37,613,699.20
5. Step 5: Solve for x
   x = 37,613,699.20/9,019.89
6. Step 6: Final answer
   x = 4,170.08