Finding the Fourth Proportional to 1,870.48, 2,578.93 and 1,427.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.48 : 2,578.93 = 1,427.68 : x
2. Step 2: Convert to fraction form
   1,870.48/2,578.93 = 1,427.68/x
3. Step 3: Cross multiply
   1,870.48x = 2,578.93 × 1,427.68
4. Step 4: Simplify right side
   1,870.48x = 3,681,886.78
5. Step 5: Solve for x
   x = 3,681,886.78/1,870.48
6. Step 6: Final answer
   x = 1,968.42