Finding the Fourth Proportional to 3,730.56, 5,147.88 and 2,158.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,730.56 : 5,147.88 = 2,158.76 : x
2. Step 2: Convert to fraction form
   3,730.56/5,147.88 = 2,158.76/x
3. Step 3: Cross multiply
   3,730.56x = 5,147.88 × 2,158.76
4. Step 4: Simplify right side
   3,730.56x = 11,113,037.43
5. Step 5: Solve for x
   x = 11,113,037.43/3,730.56
6. Step 6: Final answer
   x = 2,978.92