Finding the Fourth Proportional to 3,729.60, 5,147.52 and 2,158.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,729.60 : 5,147.52 = 2,158.56 : x
2. Step 2: Convert to fraction form
   3,729.60/5,147.52 = 2,158.56/x
3. Step 3: Cross multiply
   3,729.60x = 5,147.52 × 2,158.56
4. Step 4: Simplify right side
   3,729.60x = 11,111,230.77
5. Step 5: Solve for x
   x = 11,111,230.77/3,729.60
6. Step 6: Final answer
   x = 2,979.20