Finding the Fourth Proportional to 12,691.76, 19,041.89 and 4,377.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,691.76 : 19,041.89 = 4,377.51 : x
2. Step 2: Convert to fraction form
   12,691.76/19,041.89 = 4,377.51/x
3. Step 3: Cross multiply
   12,691.76x = 19,041.89 × 4,377.51
4. Step 4: Simplify right side
   12,691.76x = 83,356,042.01
5. Step 5: Solve for x
   x = 83,356,042.01/12,691.76
6. Step 6: Final answer
   x = 6,567.73