Finding the Fourth Proportional to 5,405.72, 8,112.52 and 3,560.74

Step by Step Solution

1. Step 1: Write the proportion equation
   5,405.72 : 8,112.52 = 3,560.74 : x
2. Step 2: Convert to fraction form
   5,405.72/8,112.52 = 3,560.74/x
3. Step 3: Cross multiply
   5,405.72x = 8,112.52 × 3,560.74
4. Step 4: Simplify right side
   5,405.72x = 28,886,574.46
5. Step 5: Solve for x
   x = 28,886,574.46/5,405.72
6. Step 6: Final answer
   x = 5,343.71