Finding the Fourth Proportional to 9,003.90, 13,512.70 and 3,165.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,003.90 : 13,512.70 = 3,165.42 : x
2. Step 2: Convert to fraction form
   9,003.90/13,512.70 = 3,165.42/x
3. Step 3: Cross multiply
   9,003.90x = 13,512.70 × 3,165.42
4. Step 4: Simplify right side
   9,003.90x = 42,773,370.83
5. Step 5: Solve for x
   x = 42,773,370.83/9,003.90
6. Step 6: Final answer
   x = 4,750.54