Finding the Fourth Proportional to 12,990.76, 17,843.51 and 12,741.70

Step by Step Solution

1. Step 1: Write the proportion equation
   12,990.76 : 17,843.51 = 12,741.70 : x
2. Step 2: Convert to fraction form
   12,990.76/17,843.51 = 12,741.70/x
3. Step 3: Cross multiply
   12,990.76x = 17,843.51 × 12,741.70
4. Step 4: Simplify right side
   12,990.76x = 227,356,651.37
5. Step 5: Solve for x
   x = 227,356,651.37/12,990.76
6. Step 6: Final answer
   x = 17,501.41