Finding the Fourth Proportional to 12,158.30, 18,242.21 and 4,761.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,158.30 : 18,242.21 = 4,761.48 : x
2. Step 2: Convert to fraction form
   12,158.30/18,242.21 = 4,761.48/x
3. Step 3: Cross multiply
   12,158.30x = 18,242.21 × 4,761.48
4. Step 4: Simplify right side
   12,158.30x = 86,859,998.38
5. Step 5: Solve for x
   x = 86,859,998.38/12,158.30
6. Step 6: Final answer
   x = 7,144.09