Finding the Fourth Proportional to 15,855.58, 21,875.37 and 9,141.05

Step by Step Solution

1. Step 1: Write the proportion equation
   15,855.58 : 21,875.37 = 9,141.05 : x
2. Step 2: Convert to fraction form
   15,855.58/21,875.37 = 9,141.05/x
3. Step 3: Cross multiply
   15,855.58x = 21,875.37 × 9,141.05
4. Step 4: Simplify right side
   15,855.58x = 199,963,871.35
5. Step 5: Solve for x
   x = 199,963,871.35/15,855.58
6. Step 6: Final answer
   x = 12,611.58