Finding the Fourth Proportional to 15,870.96, 21,901.93 and 8,797.37

Step by Step Solution

1. Step 1: Write the proportion equation
   15,870.96 : 21,901.93 = 8,797.37 : x
2. Step 2: Convert to fraction form
   15,870.96/21,901.93 = 8,797.37/x
3. Step 3: Cross multiply
   15,870.96x = 21,901.93 × 8,797.37
4. Step 4: Simplify right side
   15,870.96x = 192,679,250.42
5. Step 5: Solve for x
   x = 192,679,250.42/15,870.96
6. Step 6: Final answer
   x = 12,140.37