Finding the Fourth Proportional to 6,091.60, 8,405.72 and 3,439.12

Step by Step Solution

1. Step 1: Write the proportion equation
   6,091.60 : 8,405.72 = 3,439.12 : x
2. Step 2: Convert to fraction form
   6,091.60/8,405.72 = 3,439.12/x
3. Step 3: Cross multiply
   6,091.60x = 8,405.72 × 3,439.12
4. Step 4: Simplify right side
   6,091.60x = 28,908,279.77
5. Step 5: Solve for x
   x = 28,908,279.77/6,091.60
6. Step 6: Final answer
   x = 4,745.60