Finding the Fourth Proportional to 13,089.50, 19,638.03 and 3,855.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,089.50 : 19,638.03 = 3,855.50 : x
2. Step 2: Convert to fraction form
   13,089.50/19,638.03 = 3,855.50/x
3. Step 3: Cross multiply
   13,089.50x = 19,638.03 × 3,855.50
4. Step 4: Simplify right side
   13,089.50x = 75,714,424.67
5. Step 5: Solve for x
   x = 75,714,424.67/13,089.50
6. Step 6: Final answer
   x = 5,784.36