Finding the Fourth Proportional to 3,870.62, 5,804.54 and 1,404.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.62 : 5,804.54 = 1,404.80 : x
2. Step 2: Convert to fraction form
   3,870.62/5,804.54 = 1,404.80/x
3. Step 3: Cross multiply
   3,870.62x = 5,804.54 × 1,404.80
4. Step 4: Simplify right side
   3,870.62x = 8,154,217.79
5. Step 5: Solve for x
   x = 8,154,217.79/3,870.62
6. Step 6: Final answer
   x = 2,106.70