Finding the Fourth Proportional to 13,446.96, 18,554.06 and 7,856.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,446.96 : 18,554.06 = 7,856.88 : x
2. Step 2: Convert to fraction form
   13,446.96/18,554.06 = 7,856.88/x
3. Step 3: Cross multiply
   13,446.96x = 18,554.06 × 7,856.88
4. Step 4: Simplify right side
   13,446.96x = 145,777,022.93
5. Step 5: Solve for x
   x = 145,777,022.93/13,446.96
6. Step 6: Final answer
   x = 10,840.89