Finding the Fourth Proportional to 13,061.78, 18,030.77 and 8,818.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,061.78 : 18,030.77 = 8,818.59 : x
2. Step 2: Convert to fraction form
   13,061.78/18,030.77 = 8,818.59/x
3. Step 3: Cross multiply
   13,061.78x = 18,030.77 × 8,818.59
4. Step 4: Simplify right side
   13,061.78x = 159,005,922.94
5. Step 5: Solve for x
   x = 159,005,922.94/13,061.78
6. Step 6: Final answer
   x = 12,173.38