Finding the Fourth Proportional to 15,820.84, 21,831.69 and 8,746.30

Step by Step Solution

1. Step 1: Write the proportion equation
   15,820.84 : 21,831.69 = 8,746.30 : x
2. Step 2: Convert to fraction form
   15,820.84/21,831.69 = 8,746.30/x
3. Step 3: Cross multiply
   15,820.84x = 21,831.69 × 8,746.30
4. Step 4: Simplify right side
   15,820.84x = 190,946,510.25
5. Step 5: Solve for x
   x = 190,946,510.25/15,820.84
6. Step 6: Final answer
   x = 12,069.30