Finding the Fourth Proportional to 12,120.32, 18,180.69 and 3,800.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,120.32 : 18,180.69 = 3,800.15 : x
2. Step 2: Convert to fraction form
   12,120.32/18,180.69 = 3,800.15/x
3. Step 3: Cross multiply
   12,120.32x = 18,180.69 × 3,800.15
4. Step 4: Simplify right side
   12,120.32x = 69,089,258.20
5. Step 5: Solve for x
   x = 69,089,258.20/12,120.32
6. Step 6: Final answer
   x = 5,700.29