Finding the Fourth Proportional to 7,485.98, 11,230.89 and 2,806.05

Step by Step Solution

1. Step 1: Write the proportion equation
   7,485.98 : 11,230.89 = 2,806.05 : x
2. Step 2: Convert to fraction form
   7,485.98/11,230.89 = 2,806.05/x
3. Step 3: Cross multiply
   7,485.98x = 11,230.89 × 2,806.05
4. Step 4: Simplify right side
   7,485.98x = 31,514,494.15
5. Step 5: Solve for x
   x = 31,514,494.15/7,485.98
6. Step 6: Final answer
   x = 4,209.80