Finding the Fourth Proportional to 1,878.84, 2,816.37 and 1,394.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,878.84 : 2,816.37 = 1,394.07 : x
2. Step 2: Convert to fraction form
   1,878.84/2,816.37 = 1,394.07/x
3. Step 3: Cross multiply
   1,878.84x = 2,816.37 × 1,394.07
4. Step 4: Simplify right side
   1,878.84x = 3,926,216.93
5. Step 5: Solve for x
   x = 3,926,216.93/1,878.84
6. Step 6: Final answer
   x = 2,089.70