Finding the Fourth Proportional to 11,916.06, 17,870.61 and 4,515.18

Step by Step Solution

1. Step 1: Write the proportion equation
   11,916.06 : 17,870.61 = 4,515.18 : x
2. Step 2: Convert to fraction form
   11,916.06/17,870.61 = 4,515.18/x
3. Step 3: Cross multiply
   11,916.06x = 17,870.61 × 4,515.18
4. Step 4: Simplify right side
   11,916.06x = 80,689,020.86
5. Step 5: Solve for x
   x = 80,689,020.86/11,916.06
6. Step 6: Final answer
   x = 6,771.45