Finding the Fourth Proportional to 2,380.54, 3,284.34 and 1,385.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.54 : 3,284.34 = 1,385.60 : x
2. Step 2: Convert to fraction form
   2,380.54/3,284.34 = 1,385.60/x
3. Step 3: Cross multiply
   2,380.54x = 3,284.34 × 1,385.60
4. Step 4: Simplify right side
   2,380.54x = 4,550,781.50
5. Step 5: Solve for x
   x = 4,550,781.50/2,380.54
6. Step 6: Final answer
   x = 1,911.66