Finding the Fourth Proportional to 1,870.25, 2,580.83 and 1,030.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.25 : 2,580.83 = 1,030.78 : x
2. Step 2: Convert to fraction form
   1,870.25/2,580.83 = 1,030.78/x
3. Step 3: Cross multiply
   1,870.25x = 2,580.83 × 1,030.78
4. Step 4: Simplify right side
   1,870.25x = 2,660,269.88
5. Step 5: Solve for x
   x = 2,660,269.88/1,870.25
6. Step 6: Final answer
   x = 1,422.42