Finding the Fourth Proportional to 3,688.30, 5,531.57 and 1,055.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,688.30 : 5,531.57 = 1,055.72 : x
2. Step 2: Convert to fraction form
   3,688.30/5,531.57 = 1,055.72/x
3. Step 3: Cross multiply
   3,688.30x = 5,531.57 × 1,055.72
4. Step 4: Simplify right side
   3,688.30x = 5,839,789.08
5. Step 5: Solve for x
   x = 5,839,789.08/3,688.30
6. Step 6: Final answer
   x = 1,583.33