Finding the Fourth Proportional to 1,870.25, 2,580.95 and 1,042.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.25 : 2,580.95 = 1,042.25 : x
2. Step 2: Convert to fraction form
   1,870.25/2,580.95 = 1,042.25/x
3. Step 3: Cross multiply
   1,870.25x = 2,580.95 × 1,042.25
4. Step 4: Simplify right side
   1,870.25x = 2,689,995.14
5. Step 5: Solve for x
   x = 2,689,995.14/1,870.25
6. Step 6: Final answer
   x = 1,438.31