Finding the Fourth Proportional to 12,190.34, 18,288.01 and 3,870.17

Step by Step Solution

1. Step 1: Write the proportion equation
   12,190.34 : 18,288.01 = 3,870.17 : x
2. Step 2: Convert to fraction form
   12,190.34/18,288.01 = 3,870.17/x
3. Step 3: Cross multiply
   12,190.34x = 18,288.01 × 3,870.17
4. Step 4: Simplify right side
   12,190.34x = 70,777,707.66
5. Step 5: Solve for x
   x = 70,777,707.66/12,190.34
6. Step 6: Final answer
   x = 5,806.05