Finding the Fourth Proportional to 15,892.46, 21,931.72 and 8,819.00

Step by Step Solution

1. Step 1: Write the proportion equation
   15,892.46 : 21,931.72 = 8,819.00 : x
2. Step 2: Convert to fraction form
   15,892.46/21,931.72 = 8,819.00/x
3. Step 3: Cross multiply
   15,892.46x = 21,931.72 × 8,819.00
4. Step 4: Simplify right side
   15,892.46x = 193,415,706.97
5. Step 5: Solve for x
   x = 193,415,706.97/15,892.46
6. Step 6: Final answer
   x = 12,170.29