Finding the Fourth Proportional to 12,200.63, 18,300.75 and 3,880.53

Step by Step Solution

1. Step 1: Write the proportion equation
   12,200.63 : 18,300.75 = 3,880.53 : x
2. Step 2: Convert to fraction form
   12,200.63/18,300.75 = 3,880.53/x
3. Step 3: Cross multiply
   12,200.63x = 18,300.75 × 3,880.53
4. Step 4: Simplify right side
   12,200.63x = 71,016,517.89
5. Step 5: Solve for x
   x = 71,016,517.89/12,200.63
6. Step 6: Final answer
   x = 5,820.73