Finding the Fourth Proportional to 13,211.32, 19,820.24 and 3,851.40

Step by Step Solution

1. Step 1: Write the proportion equation
   13,211.32 : 19,820.24 = 3,851.40 : x
2. Step 2: Convert to fraction form
   13,211.32/19,820.24 = 3,851.40/x
3. Step 3: Cross multiply
   13,211.32x = 19,820.24 × 3,851.40
4. Step 4: Simplify right side
   13,211.32x = 76,335,672.34
5. Step 5: Solve for x
   x = 76,335,672.34/13,211.32
6. Step 6: Final answer
   x = 5,778.05