Finding the Fourth Proportional to 13,921.02, 20,870.82 and 4,555.35

Step by Step Solution

1. Step 1: Write the proportion equation
   13,921.02 : 20,870.82 = 4,555.35 : x
2. Step 2: Convert to fraction form
   13,921.02/20,870.82 = 4,555.35/x
3. Step 3: Cross multiply
   13,921.02x = 20,870.82 × 4,555.35
4. Step 4: Simplify right side
   13,921.02x = 95,073,889.89
5. Step 5: Solve for x
   x = 95,073,889.89/13,921.02
6. Step 6: Final answer
   x = 6,829.52