Finding the Fourth Proportional to 12,192.84, 18,282.72 and 3,870.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,192.84 : 18,282.72 = 3,870.60 : x
2. Step 2: Convert to fraction form
   12,192.84/18,282.72 = 3,870.60/x
3. Step 3: Cross multiply
   12,192.84x = 18,282.72 × 3,870.60
4. Step 4: Simplify right side
   12,192.84x = 70,765,096.03
5. Step 5: Solve for x
   x = 70,765,096.03/12,192.84
6. Step 6: Final answer
   x = 5,803.82