Finding the Fourth Proportional to 8,870.29, 12,240.38 and 4,891.32

Step by Step Solution

1. Step 1: Write the proportion equation
   8,870.29 : 12,240.38 = 4,891.32 : x
2. Step 2: Convert to fraction form
   8,870.29/12,240.38 = 4,891.32/x
3. Step 3: Cross multiply
   8,870.29x = 12,240.38 × 4,891.32
4. Step 4: Simplify right side
   8,870.29x = 59,871,529.84
5. Step 5: Solve for x
   x = 59,871,529.84/8,870.29
6. Step 6: Final answer
   x = 6,749.67