Finding the Fourth Proportional to 12,681.76, 19,012.34 and 5,291.73

Step by Step Solution

1. Step 1: Write the proportion equation
   12,681.76 : 19,012.34 = 5,291.73 : x
2. Step 2: Convert to fraction form
   12,681.76/19,012.34 = 5,291.73/x
3. Step 3: Cross multiply
   12,681.76x = 19,012.34 × 5,291.73
4. Step 4: Simplify right side
   12,681.76x = 100,608,169.95
5. Step 5: Solve for x
   x = 100,608,169.95/12,681.76
6. Step 6: Final answer
   x = 7,933.30