Finding the Fourth Proportional to 15,870.93, 21,901.37 and 9,582.21

Step by Step Solution

1. Step 1: Write the proportion equation
   15,870.93 : 21,901.37 = 9,582.21 : x
2. Step 2: Convert to fraction form
   15,870.93/21,901.37 = 9,582.21/x
3. Step 3: Cross multiply
   15,870.93x = 21,901.37 × 9,582.21
4. Step 4: Simplify right side
   15,870.93x = 209,863,478.72
5. Step 5: Solve for x
   x = 209,863,478.72/15,870.93
6. Step 6: Final answer
   x = 13,223.14