Finding the Fourth Proportional to 2,178.09, 3,005.78 and 1,338.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178.09 : 3,005.78 = 1,338.93 : x
2. Step 2: Convert to fraction form
   2,178.09/3,005.78 = 1,338.93/x
3. Step 3: Cross multiply
   2,178.09x = 3,005.78 × 1,338.93
4. Step 4: Simplify right side
   2,178.09x = 4,024,522.32
5. Step 5: Solve for x
   x = 4,024,522.32/2,178.09
6. Step 6: Final answer
   x = 1,847.73