Finding the Fourth Proportional to 12,739, 19,113.36 and 4,948.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,739 : 19,113.36 = 4,948.42 : x
2. Step 2: Convert to fraction form
   12,739/19,113.36 = 4,948.42/x
3. Step 3: Cross multiply
   12,739x = 19,113.36 × 4,948.42
4. Step 4: Simplify right side
   12,739x = 94,580,932.89
5. Step 5: Solve for x
   x = 94,580,932.89/12,739
6. Step 6: Final answer
   x = 7,424.52