Finding the Fourth Proportional to 3,927.30, 5,419.32 and 2,158.46

Step by Step Solution

1. Step 1: Write the proportion equation
   3,927.30 : 5,419.32 = 2,158.46 : x
2. Step 2: Convert to fraction form
   3,927.30/5,419.32 = 2,158.46/x
3. Step 3: Cross multiply
   3,927.30x = 5,419.32 × 2,158.46
4. Step 4: Simplify right side
   3,927.30x = 11,697,385.45
5. Step 5: Solve for x
   x = 11,697,385.45/3,927.30
6. Step 6: Final answer
   x = 2,978.48