Finding the Fourth Proportional to 13,858.72, 19,145.94 and 9,089.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,858.72 : 19,145.94 = 9,089.98 : x
2. Step 2: Convert to fraction form
   13,858.72/19,145.94 = 9,089.98/x
3. Step 3: Cross multiply
   13,858.72x = 19,145.94 × 9,089.98
4. Step 4: Simplify right side
   13,858.72x = 174,036,211.68
5. Step 5: Solve for x
   x = 174,036,211.68/13,858.72
6. Step 6: Final answer
   x = 12,557.88