Finding the Fourth Proportional to 2,379.60, 3,284.55 and 1,385.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,379.60 : 3,284.55 = 1,385.32 : x
2. Step 2: Convert to fraction form
   2,379.60/3,284.55 = 1,385.32/x
3. Step 3: Cross multiply
   2,379.60x = 3,284.55 × 1,385.32
4. Step 4: Simplify right side
   2,379.60x = 4,550,152.81
5. Step 5: Solve for x
   x = 4,550,152.81/2,379.60
6. Step 6: Final answer
   x = 1,912.15