Finding the Fourth Proportional to 3,611.79, 5,385.32 and 3,546.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,611.79 : 5,385.32 = 3,546.18 : x
2. Step 2: Convert to fraction form
   3,611.79/5,385.32 = 3,546.18/x
3. Step 3: Cross multiply
   3,611.79x = 5,385.32 × 3,546.18
4. Step 4: Simplify right side
   3,611.79x = 19,097,296.35
5. Step 5: Solve for x
   x = 19,097,296.35/3,611.79
6. Step 6: Final answer
   x = 5,287.49