Finding the Fourth Proportional to 13,323.34, 18,390.52 and 8,603.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,323.34 : 18,390.52 = 8,603.98 : x
2. Step 2: Convert to fraction form
   13,323.34/18,390.52 = 8,603.98/x
3. Step 3: Cross multiply
   13,323.34x = 18,390.52 × 8,603.98
4. Step 4: Simplify right side
   13,323.34x = 158,231,666.27
5. Step 5: Solve for x
   x = 158,231,666.27/13,323.34
6. Step 6: Final answer
   x = 11,876.28