Finding the Fourth Proportional to 15,870.66, 21,902.31 and 8,796.93

Step by Step Solution

1. Step 1: Write the proportion equation
   15,870.66 : 21,902.31 = 8,796.93 : x
2. Step 2: Convert to fraction form
   15,870.66/21,902.31 = 8,796.93/x
3. Step 3: Cross multiply
   15,870.66x = 21,902.31 × 8,796.93
4. Step 4: Simplify right side
   15,870.66x = 192,673,087.91
5. Step 5: Solve for x
   x = 192,673,087.91/15,870.66
6. Step 6: Final answer
   x = 12,140.21