Finding the Fourth Proportional to 4,870.90, 7,305.81 and 1,408.15

Step by Step Solution

1. Step 1: Write the proportion equation
   4,870.90 : 7,305.81 = 1,408.15 : x
2. Step 2: Convert to fraction form
   4,870.90/7,305.81 = 1,408.15/x
3. Step 3: Cross multiply
   4,870.90x = 7,305.81 × 1,408.15
4. Step 4: Simplify right side
   4,870.90x = 10,287,676.35
5. Step 5: Solve for x
   x = 10,287,676.35/4,870.90
6. Step 6: Final answer
   x = 2,112.07