Finding the Fourth Proportional to 11,439.42, 17,152.35 and 3,539.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,439.42 : 17,152.35 = 3,539.60 : x
2. Step 2: Convert to fraction form
   11,439.42/17,152.35 = 3,539.60/x
3. Step 3: Cross multiply
   11,439.42x = 17,152.35 × 3,539.60
4. Step 4: Simplify right side
   11,439.42x = 60,712,359.02
5. Step 5: Solve for x
   x = 60,712,359.02/11,439.42
6. Step 6: Final answer
   x = 5,307.29