Finding the Fourth Proportional to 1,878.06, 2,592.39 and 1,215.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,878.06 : 2,592.39 = 1,215.42 : x
2. Step 2: Convert to fraction form
   1,878.06/2,592.39 = 1,215.42/x
3. Step 3: Cross multiply
   1,878.06x = 2,592.39 × 1,215.42
4. Step 4: Simplify right side
   1,878.06x = 3,150,842.65
5. Step 5: Solve for x
   x = 3,150,842.65/1,878.06
6. Step 6: Final answer
   x = 1,677.71