Finding the Fourth Proportional to 8,123.37, 12,185.14 and 2,858.53

Step by Step Solution

1. Step 1: Write the proportion equation
   8,123.37 : 12,185.14 = 2,858.53 : x
2. Step 2: Convert to fraction form
   8,123.37/12,185.14 = 2,858.53/x
3. Step 3: Cross multiply
   8,123.37x = 12,185.14 × 2,858.53
4. Step 4: Simplify right side
   8,123.37x = 34,831,588.24
5. Step 5: Solve for x
   x = 34,831,588.24/8,123.37
6. Step 6: Final answer
   x = 4,287.82