Finding the Fourth Proportional to 3,611.30, 5,405.60 and 3,527.06

Step by Step Solution

1. Step 1: Write the proportion equation
   3,611.30 : 5,405.60 = 3,527.06 : x
2. Step 2: Convert to fraction form
   3,611.30/5,405.60 = 3,527.06/x
3. Step 3: Cross multiply
   3,611.30x = 5,405.60 × 3,527.06
4. Step 4: Simplify right side
   3,611.30x = 19,065,830.87
5. Step 5: Solve for x
   x = 19,065,830.87/3,611.30
6. Step 6: Final answer
   x = 5,279.50