Finding the Fourth Proportional to 3,892.79, 5,372.15 and 2,380.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,892.79 : 5,372.15 = 2,380.59 : x
2. Step 2: Convert to fraction form
   3,892.79/5,372.15 = 2,380.59/x
3. Step 3: Cross multiply
   3,892.79x = 5,372.15 × 2,380.59
4. Step 4: Simplify right side
   3,892.79x = 12,788,886.57
5. Step 5: Solve for x
   x = 12,788,886.57/3,892.79
6. Step 6: Final answer
   x = 3,285.28