Finding the Fourth Proportional to 12,987.31, 19,483.41 and 4,224.73

Step by Step Solution

1. Step 1: Write the proportion equation
   12,987.31 : 19,483.41 = 4,224.73 : x
2. Step 2: Convert to fraction form
   12,987.31/19,483.41 = 4,224.73/x
3. Step 3: Cross multiply
   12,987.31x = 19,483.41 × 4,224.73
4. Step 4: Simplify right side
   12,987.31x = 82,312,146.73
5. Step 5: Solve for x
   x = 82,312,146.73/12,987.31
6. Step 6: Final answer
   x = 6,337.89