Finding the Fourth Proportional to 12,762.24, 19,145.60 and 3,998.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,762.24 : 19,145.60 = 3,998.72 : x
2. Step 2: Convert to fraction form
   12,762.24/19,145.60 = 3,998.72/x
3. Step 3: Cross multiply
   12,762.24x = 19,145.60 × 3,998.72
4. Step 4: Simplify right side
   12,762.24x = 76,557,893.63
5. Step 5: Solve for x
   x = 76,557,893.63/12,762.24
6. Step 6: Final answer
   x = 5,998.78