Finding the Fourth Proportional to 9,386.66, 12,951.42 and 5,611.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,386.66 : 12,951.42 = 5,611.02 : x
2. Step 2: Convert to fraction form
   9,386.66/12,951.42 = 5,611.02/x
3. Step 3: Cross multiply
   9,386.66x = 12,951.42 × 5,611.02
4. Step 4: Simplify right side
   9,386.66x = 72,670,676.65
5. Step 5: Solve for x
   x = 72,670,676.65/9,386.66
6. Step 6: Final answer
   x = 7,741.91