Finding the Fourth Proportional to 8,870.88, 13,314.56 and 4,491.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,870.88 : 13,314.56 = 4,491.40 : x
2. Step 2: Convert to fraction form
   8,870.88/13,314.56 = 4,491.40/x
3. Step 3: Cross multiply
   8,870.88x = 13,314.56 × 4,491.40
4. Step 4: Simplify right side
   8,870.88x = 59,801,014.78
5. Step 5: Solve for x
   x = 59,801,014.78/8,870.88
6. Step 6: Final answer
   x = 6,741.27