Finding the Fourth Proportional to 12,131.87, 18,186.98 and 4,734.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,131.87 : 18,186.98 = 4,734.61 : x
2. Step 2: Convert to fraction form
   12,131.87/18,186.98 = 4,734.61/x
3. Step 3: Cross multiply
   12,131.87x = 18,186.98 × 4,734.61
4. Step 4: Simplify right side
   12,131.87x = 86,108,142.77
5. Step 5: Solve for x
   x = 86,108,142.77/12,131.87
6. Step 6: Final answer
   x = 7,097.68