Finding the Fourth Proportional to 10,886.40, 16,323.21 and 3,487.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,886.40 : 16,323.21 = 3,487.05 : x
2. Step 2: Convert to fraction form
   10,886.40/16,323.21 = 3,487.05/x
3. Step 3: Cross multiply
   10,886.40x = 16,323.21 × 3,487.05
4. Step 4: Simplify right side
   10,886.40x = 56,919,849.43
5. Step 5: Solve for x
   x = 56,919,849.43/10,886.40
6. Step 6: Final answer
   x = 5,228.53