Finding the Fourth Proportional to 1,603.38, 2,404.10 and 1,421.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,603.38 : 2,404.10 = 1,421.12 : x
2. Step 2: Convert to fraction form
   1,603.38/2,404.10 = 1,421.12/x
3. Step 3: Cross multiply
   1,603.38x = 2,404.10 × 1,421.12
4. Step 4: Simplify right side
   1,603.38x = 3,416,514.59
5. Step 5: Solve for x
   x = 3,416,514.59/1,603.38
6. Step 6: Final answer
   x = 2,130.82