Finding the Fourth Proportional to 5,405.30, 8,111.55 and 3,065.30

Step by Step Solution

1. Step 1: Write the proportion equation
   5,405.30 : 8,111.55 = 3,065.30 : x
2. Step 2: Convert to fraction form
   5,405.30/8,111.55 = 3,065.30/x
3. Step 3: Cross multiply
   5,405.30x = 8,111.55 × 3,065.30
4. Step 4: Simplify right side
   5,405.30x = 24,864,334.22
5. Step 5: Solve for x
   x = 24,864,334.22/5,405.30
6. Step 6: Final answer
   x = 4,599.99