Finding the Fourth Proportional to 9,110.75, 12,570.67 and 5,131.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,110.75 : 12,570.67 = 5,131.07 : x
2. Step 2: Convert to fraction form
   9,110.75/12,570.67 = 5,131.07/x
3. Step 3: Cross multiply
   9,110.75x = 12,570.67 × 5,131.07
4. Step 4: Simplify right side
   9,110.75x = 64,500,987.72
5. Step 5: Solve for x
   x = 64,500,987.72/9,110.75
6. Step 6: Final answer
   x = 7,079.66