Finding the Fourth Proportional to 3,603.63, 5,406.35 and 1,006.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,603.63 : 5,406.35 = 1,006.57 : x
2. Step 2: Convert to fraction form
   3,603.63/5,406.35 = 1,006.57/x
3. Step 3: Cross multiply
   3,603.63x = 5,406.35 × 1,006.57
4. Step 4: Simplify right side
   3,603.63x = 5,441,869.72
5. Step 5: Solve for x
   x = 5,441,869.72/3,603.63
6. Step 6: Final answer
   x = 1,510.11