Finding the Fourth Proportional to 9,002.12, 13,503.16 and 3,160.40

Step by Step Solution

1. Step 1: Write the proportion equation
   9,002.12 : 13,503.16 = 3,160.40 : x
2. Step 2: Convert to fraction form
   9,002.12/13,503.16 = 3,160.40/x
3. Step 3: Cross multiply
   9,002.12x = 13,503.16 × 3,160.40
4. Step 4: Simplify right side
   9,002.12x = 42,675,386.86
5. Step 5: Solve for x
   x = 42,675,386.86/9,002.12
6. Step 6: Final answer
   x = 4,740.59