Finding the Fourth Proportional to 15,892.56, 21,931.70 and 8,818.83

Step by Step Solution

1. Step 1: Write the proportion equation
   15,892.56 : 21,931.70 = 8,818.83 : x
2. Step 2: Convert to fraction form
   15,892.56/21,931.70 = 8,818.83/x
3. Step 3: Cross multiply
   15,892.56x = 21,931.70 × 8,818.83
4. Step 4: Simplify right side
   15,892.56x = 193,411,889.82
5. Step 5: Solve for x
   x = 193,411,889.82/15,892.56
6. Step 6: Final answer
   x = 12,169.96