Finding the Fourth Proportional to 5,531.25, 7,639.61 and 3,665.01

Step by Step Solution

1. Step 1: Write the proportion equation
   5,531.25 : 7,639.61 = 3,665.01 : x
2. Step 2: Convert to fraction form
   5,531.25/7,639.61 = 3,665.01/x
3. Step 3: Cross multiply
   5,531.25x = 7,639.61 × 3,665.01
4. Step 4: Simplify right side
   5,531.25x = 27,999,228.72
5. Step 5: Solve for x
   x = 27,999,228.72/5,531.25
6. Step 6: Final answer
   x = 5,062.01