Finding the Fourth Proportional to 9,345.15, 14,020.47 and 3,019.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,345.15 : 14,020.47 = 3,019.91 : x
2. Step 2: Convert to fraction form
   9,345.15/14,020.47 = 3,019.91/x
3. Step 3: Cross multiply
   9,345.15x = 14,020.47 × 3,019.91
4. Step 4: Simplify right side
   9,345.15x = 42,340,487.46
5. Step 5: Solve for x
   x = 42,340,487.46/9,345.15
6. Step 6: Final answer
   x = 4,530.74