Finding the Fourth Proportional to 5,892.12, 8,128.86 and 3,591.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,892.12 : 8,128.86 = 3,591.72 : x
2. Step 2: Convert to fraction form
   5,892.12/8,128.86 = 3,591.72/x
3. Step 3: Cross multiply
   5,892.12x = 8,128.86 × 3,591.72
4. Step 4: Simplify right side
   5,892.12x = 29,196,589.04
5. Step 5: Solve for x
   x = 29,196,589.04/5,892.12
6. Step 6: Final answer
   x = 4,955.19