Finding the Fourth Proportional to 9,139.35, 12,611.99 and 5,106.29

Step by Step Solution

1. Step 1: Write the proportion equation
   9,139.35 : 12,611.99 = 5,106.29 : x
2. Step 2: Convert to fraction form
   9,139.35/12,611.99 = 5,106.29/x
3. Step 3: Cross multiply
   9,139.35x = 12,611.99 × 5,106.29
4. Step 4: Simplify right side
   9,139.35x = 64,400,452.89
5. Step 5: Solve for x
   x = 64,400,452.89/9,139.35
6. Step 6: Final answer
   x = 7,046.50