Finding the Fourth Proportional to 1,870.18, 2,578.10 and 1,308.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.18 : 2,578.10 = 1,308.92 : x
2. Step 2: Convert to fraction form
   1,870.18/2,578.10 = 1,308.92/x
3. Step 3: Cross multiply
   1,870.18x = 2,578.10 × 1,308.92
4. Step 4: Simplify right side
   1,870.18x = 3,374,526.65
5. Step 5: Solve for x
   x = 3,374,526.65/1,870.18
6. Step 6: Final answer
   x = 1,804.39