Finding the Fourth Proportional to 2,404.80, 3,603.15 and 1,991.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,404.80 : 3,603.15 = 1,991.70 : x
2. Step 2: Convert to fraction form
   2,404.80/3,603.15 = 1,991.70/x
3. Step 3: Cross multiply
   2,404.80x = 3,603.15 × 1,991.70
4. Step 4: Simplify right side
   2,404.80x = 7,176,393.86
5. Step 5: Solve for x
   x = 7,176,393.86/2,404.80
6. Step 6: Final answer
   x = 2,984.20