Finding the Fourth Proportional to 13,089.27, 19,609.61 and 8,870.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,089.27 : 19,609.61 = 8,870.52 : x
2. Step 2: Convert to fraction form
   13,089.27/19,609.61 = 8,870.52/x
3. Step 3: Cross multiply
   13,089.27x = 19,609.61 × 8,870.52
4. Step 4: Simplify right side
   13,089.27x = 173,947,393.34
5. Step 5: Solve for x
   x = 173,947,393.34/13,089.27
6. Step 6: Final answer
   x = 13,289.31