Finding the Fourth Proportional to 12,319.16, 18,478.72 and 3,554.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,319.16 : 18,478.72 = 3,554.12 : x
2. Step 2: Convert to fraction form
   12,319.16/18,478.72 = 3,554.12/x
3. Step 3: Cross multiply
   12,319.16x = 18,478.72 × 3,554.12
4. Step 4: Simplify right side
   12,319.16x = 65,675,588.33
5. Step 5: Solve for x
   x = 65,675,588.33/12,319.16
6. Step 6: Final answer
   x = 5,331.17