Finding the Fourth Proportional to 2,051.39, 2,830.02 and 1,388

Step by Step Solution

1. Step 1: Write the proportion equation
   2,051.39 : 2,830.02 = 1,388 : x
2. Step 2: Convert to fraction form
   2,051.39/2,830.02 = 1,388/x
3. Step 3: Cross multiply
   2,051.39x = 2,830.02 × 1,388
4. Step 4: Simplify right side
   2,051.39x = 3,928,067.76
5. Step 5: Solve for x
   x = 3,928,067.76/2,051.39
6. Step 6: Final answer
   x = 1,914.83