Finding the Fourth Proportional to 13,890.52, 19,168.96 and 7,603.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,890.52 : 19,168.96 = 7,603.30 : x
2. Step 2: Convert to fraction form
   13,890.52/19,168.96 = 7,603.30/x
3. Step 3: Cross multiply
   13,890.52x = 19,168.96 × 7,603.30
4. Step 4: Simplify right side
   13,890.52x = 145,747,353.57
5. Step 5: Solve for x
   x = 145,747,353.57/13,890.52
6. Step 6: Final answer
   x = 10,492.58