Finding the Fourth Proportional to 15,870.89, 21,902.52 and 8,797.32

Step by Step Solution

1. Step 1: Write the proportion equation
   15,870.89 : 21,902.52 = 8,797.32 : x
2. Step 2: Convert to fraction form
   15,870.89/21,902.52 = 8,797.32/x
3. Step 3: Cross multiply
   15,870.89x = 21,902.52 × 8,797.32
4. Step 4: Simplify right side
   15,870.89x = 192,683,477.25
5. Step 5: Solve for x
   x = 192,683,477.25/15,870.89
6. Step 6: Final answer
   x = 12,140.69