Finding the Fourth Proportional to 2,380.10, 3,284.64 and 1,385.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.10 : 3,284.64 = 1,385.17 : x
2. Step 2: Convert to fraction form
   2,380.10/3,284.64 = 1,385.17/x
3. Step 3: Cross multiply
   2,380.10x = 3,284.64 × 1,385.17
4. Step 4: Simplify right side
   2,380.10x = 4,549,776.58
5. Step 5: Solve for x
   x = 4,549,776.58/2,380.10
6. Step 6: Final answer
   x = 1,911.59