Finding the Fourth Proportional to 6,615.50, 9,916.56 and 4,152.06

Step by Step Solution

1. Step 1: Write the proportion equation
   6,615.50 : 9,916.56 = 4,152.06 : x
2. Step 2: Convert to fraction form
   6,615.50/9,916.56 = 4,152.06/x
3. Step 3: Cross multiply
   6,615.50x = 9,916.56 × 4,152.06
4. Step 4: Simplify right side
   6,615.50x = 41,174,152.11
5. Step 5: Solve for x
   x = 41,174,152.11/6,615.50
6. Step 6: Final answer
   x = 6,223.89