Finding the Fourth Proportional to 3,575.10, 5,362.88 and 1,111.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,575.10 : 5,362.88 = 1,111.53 : x
2. Step 2: Convert to fraction form
   3,575.10/5,362.88 = 1,111.53/x
3. Step 3: Cross multiply
   3,575.10x = 5,362.88 × 1,111.53
4. Step 4: Simplify right side
   3,575.10x = 5,960,996.45
5. Step 5: Solve for x
   x = 5,960,996.45/3,575.10
6. Step 6: Final answer
   x = 1,667.36