Finding the Fourth Proportional to 12,427.82, 18,642.31 and 3,543.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,427.82 : 18,642.31 = 3,543.76 : x
2. Step 2: Convert to fraction form
   12,427.82/18,642.31 = 3,543.76/x
3. Step 3: Cross multiply
   12,427.82x = 18,642.31 × 3,543.76
4. Step 4: Simplify right side
   12,427.82x = 66,063,817.02
5. Step 5: Solve for x
   x = 66,063,817.02/12,427.82
6. Step 6: Final answer
   x = 5,315.80