Finding the Fourth Proportional to 3,687.98, 5,530.84 and 1,055.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,687.98 : 5,530.84 = 1,055.30 : x
2. Step 2: Convert to fraction form
   3,687.98/5,530.84 = 1,055.30/x
3. Step 3: Cross multiply
   3,687.98x = 5,530.84 × 1,055.30
4. Step 4: Simplify right side
   3,687.98x = 5,836,695.45
5. Step 5: Solve for x
   x = 5,836,695.45/3,687.98
6. Step 6: Final answer
   x = 1,582.63