Finding the Fourth Proportional to 12,876.58, 19,315.05 and 3,642.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,876.58 : 19,315.05 = 3,642.58 : x
2. Step 2: Convert to fraction form
   12,876.58/19,315.05 = 3,642.58/x
3. Step 3: Cross multiply
   12,876.58x = 19,315.05 × 3,642.58
4. Step 4: Simplify right side
   12,876.58x = 70,356,614.83
5. Step 5: Solve for x
   x = 70,356,614.83/12,876.58
6. Step 6: Final answer
   x = 5,463.92