Finding the Fourth Proportional to 2,164.86, 3,246.60 and 1,383.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,164.86 : 3,246.60 = 1,383.78 : x
2. Step 2: Convert to fraction form
   2,164.86/3,246.60 = 1,383.78/x
3. Step 3: Cross multiply
   2,164.86x = 3,246.60 × 1,383.78
4. Step 4: Simplify right side
   2,164.86x = 4,492,580.15
5. Step 5: Solve for x
   x = 4,492,580.15/2,164.86
6. Step 6: Final answer
   x = 2,075.23