Finding the Fourth Proportional to 9,918.21, 14,871.31 and 3,907.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,918.21 : 14,871.31 = 3,907.09 : x
2. Step 2: Convert to fraction form
   9,918.21/14,871.31 = 3,907.09/x
3. Step 3: Cross multiply
   9,918.21x = 14,871.31 × 3,907.09
4. Step 4: Simplify right side
   9,918.21x = 58,103,546.59
5. Step 5: Solve for x
   x = 58,103,546.59/9,918.21
6. Step 6: Final answer
   x = 5,858.27