Finding the Fourth Proportional to 13,905.82, 20,858.72 and 5,585.83

Step by Step Solution

1. Step 1: Write the proportion equation
   13,905.82 : 20,858.72 = 5,585.83 : x
2. Step 2: Convert to fraction form
   13,905.82/20,858.72 = 5,585.83/x
3. Step 3: Cross multiply
   13,905.82x = 20,858.72 × 5,585.83
4. Step 4: Simplify right side
   13,905.82x = 116,513,263.94
5. Step 5: Solve for x
   x = 116,513,263.94/13,905.82
6. Step 6: Final answer
   x = 8,378.74