Finding the Fourth Proportional to 12,741.69, 19,115.18 and 3,857.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,741.69 : 19,115.18 = 3,857.51 : x
2. Step 2: Convert to fraction form
   12,741.69/19,115.18 = 3,857.51/x
3. Step 3: Cross multiply
   12,741.69x = 19,115.18 × 3,857.51
4. Step 4: Simplify right side
   12,741.69x = 73,737,008.66
5. Step 5: Solve for x
   x = 73,737,008.66/12,741.69
6. Step 6: Final answer
   x = 5,787.07