Finding the Fourth Proportional to 12,380.05, 18,570.35 and 3,020.13

Step by Step Solution

1. Step 1: Write the proportion equation
   12,380.05 : 18,570.35 = 3,020.13 : x
2. Step 2: Convert to fraction form
   12,380.05/18,570.35 = 3,020.13/x
3. Step 3: Cross multiply
   12,380.05x = 18,570.35 × 3,020.13
4. Step 4: Simplify right side
   12,380.05x = 56,084,871.15
5. Step 5: Solve for x
   x = 56,084,871.15/12,380.05
6. Step 6: Final answer
   x = 4,530.26