Finding the Fourth Proportional to 13,830.10, 19,085.49 and 7,542.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,830.10 : 19,085.49 = 7,542.42 : x
2. Step 2: Convert to fraction form
   13,830.10/19,085.49 = 7,542.42/x
3. Step 3: Cross multiply
   13,830.10x = 19,085.49 × 7,542.42
4. Step 4: Simplify right side
   13,830.10x = 143,950,781.49
5. Step 5: Solve for x
   x = 143,950,781.49/13,830.10
6. Step 6: Final answer
   x = 10,408.51