Finding the Fourth Proportional to 1,604.42, 2,213.55 and 1,045.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,604.42 : 2,213.55 = 1,045.61 : x
2. Step 2: Convert to fraction form
   1,604.42/2,213.55 = 1,045.61/x
3. Step 3: Cross multiply
   1,604.42x = 2,213.55 × 1,045.61
4. Step 4: Simplify right side
   1,604.42x = 2,314,498.95
5. Step 5: Solve for x
   x = 2,314,498.95/1,604.42
6. Step 6: Final answer
   x = 1,442.58