Finding the Fourth Proportional to 8,907.74, 12,291.30 and 5,131.07

Step by Step Solution

1. Step 1: Write the proportion equation
   8,907.74 : 12,291.30 = 5,131.07 : x
2. Step 2: Convert to fraction form
   8,907.74/12,291.30 = 5,131.07/x
3. Step 3: Cross multiply
   8,907.74x = 12,291.30 × 5,131.07
4. Step 4: Simplify right side
   8,907.74x = 63,067,459.23
5. Step 5: Solve for x
   x = 63,067,459.23/8,907.74
6. Step 6: Final answer
   x = 7,080.07