Finding the Fourth Proportional to 1,878.30, 2,589.32 and 1,317.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,878.30 : 2,589.32 = 1,317.08 : x
2. Step 2: Convert to fraction form
   1,878.30/2,589.32 = 1,317.08/x
3. Step 3: Cross multiply
   1,878.30x = 2,589.32 × 1,317.08
4. Step 4: Simplify right side
   1,878.30x = 3,410,341.59
5. Step 5: Solve for x
   x = 3,410,341.59/1,878.30
6. Step 6: Final answer
   x = 1,815.65