Finding the Fourth Proportional to 3,889.98, 5,802.60 and 3,516.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,889.98 : 5,802.60 = 3,516.30 : x
2. Step 2: Convert to fraction form
   3,889.98/5,802.60 = 3,516.30/x
3. Step 3: Cross multiply
   3,889.98x = 5,802.60 × 3,516.30
4. Step 4: Simplify right side
   3,889.98x = 20,403,682.38
5. Step 5: Solve for x
   x = 20,403,682.38/3,889.98
6. Step 6: Final answer
   x = 5,245.19