Finding the Fourth Proportional to 1,878.72, 2,590.16 and 1,435.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,878.72 : 2,590.16 = 1,435.84 : x
2. Step 2: Convert to fraction form
   1,878.72/2,590.16 = 1,435.84/x
3. Step 3: Cross multiply
   1,878.72x = 2,590.16 × 1,435.84
4. Step 4: Simplify right side
   1,878.72x = 3,719,055.33
5. Step 5: Solve for x
   x = 3,719,055.33/1,878.72
6. Step 6: Final answer
   x = 1,979.57