Finding the Fourth Proportional to 2,380.10, 3,285.09 and 1,385.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.10 : 3,285.09 = 1,385.51 : x
2. Step 2: Convert to fraction form
   2,380.10/3,285.09 = 1,385.51/x
3. Step 3: Cross multiply
   2,380.10x = 3,285.09 × 1,385.51
4. Step 4: Simplify right side
   2,380.10x = 4,551,508.62
5. Step 5: Solve for x
   x = 4,551,508.62/2,380.10
6. Step 6: Final answer
   x = 1,912.32