Finding the Fourth Proportional to 13,261.72, 19,888.37 and 4,494.58

Step by Step Solution

1. Step 1: Write the proportion equation
   13,261.72 : 19,888.37 = 4,494.58 : x
2. Step 2: Convert to fraction form
   13,261.72/19,888.37 = 4,494.58/x
3. Step 3: Cross multiply
   13,261.72x = 19,888.37 × 4,494.58
4. Step 4: Simplify right side
   13,261.72x = 89,389,870.03
5. Step 5: Solve for x
   x = 89,389,870.03/13,261.72
6. Step 6: Final answer
   x = 6,740.44