Finding the Fourth Proportional to 8,870.15, 12,240.51 and 4,891.07

Step by Step Solution

1. Step 1: Write the proportion equation
   8,870.15 : 12,240.51 = 4,891.07 : x
2. Step 2: Convert to fraction form
   8,870.15/12,240.51 = 4,891.07/x
3. Step 3: Cross multiply
   8,870.15x = 12,240.51 × 4,891.07
4. Step 4: Simplify right side
   8,870.15x = 59,869,191.25
5. Step 5: Solve for x
   x = 59,869,191.25/8,870.15
6. Step 6: Final answer
   x = 6,749.51