Finding the Fourth Proportional to 3,618.96, 5,429.31 and 1,427.77

Step by Step Solution

1. Step 1: Write the proportion equation
   3,618.96 : 5,429.31 = 1,427.77 : x
2. Step 2: Convert to fraction form
   3,618.96/5,429.31 = 1,427.77/x
3. Step 3: Cross multiply
   3,618.96x = 5,429.31 × 1,427.77
4. Step 4: Simplify right side
   3,618.96x = 7,751,805.94
5. Step 5: Solve for x
   x = 7,751,805.94/3,618.96
6. Step 6: Final answer
   x = 2,142.00