Finding the Fourth Proportional to 8,870.23, 12,240.35 and 4,891.37

Step by Step Solution

1. Step 1: Write the proportion equation
   8,870.23 : 12,240.35 = 4,891.37 : x
2. Step 2: Convert to fraction form
   8,870.23/12,240.35 = 4,891.37/x
3. Step 3: Cross multiply
   8,870.23x = 12,240.35 × 4,891.37
4. Step 4: Simplify right side
   8,870.23x = 59,872,080.78
5. Step 5: Solve for x
   x = 59,872,080.78/8,870.23
6. Step 6: Final answer
   x = 6,749.78