Finding the Fourth Proportional to 12,919.31, 19,380.80 and 4,596.87

Step by Step Solution

1. Step 1: Write the proportion equation
   12,919.31 : 19,380.80 = 4,596.87 : x
2. Step 2: Convert to fraction form
   12,919.31/19,380.80 = 4,596.87/x
3. Step 3: Cross multiply
   12,919.31x = 19,380.80 × 4,596.87
4. Step 4: Simplify right side
   12,919.31x = 89,091,018.10
5. Step 5: Solve for x
   x = 89,091,018.10/12,919.31
6. Step 6: Final answer
   x = 6,895.96