Finding the Fourth Proportional to 6,415.59, 8,853.17 and 3,620.91

Step by Step Solution

1. Step 1: Write the proportion equation
   6,415.59 : 8,853.17 = 3,620.91 : x
2. Step 2: Convert to fraction form
   6,415.59/8,853.17 = 3,620.91/x
3. Step 3: Cross multiply
   6,415.59x = 8,853.17 × 3,620.91
4. Step 4: Simplify right side
   6,415.59x = 32,056,494.06
5. Step 5: Solve for x
   x = 32,056,494.06/6,415.59
6. Step 6: Final answer
   x = 4,996.66