Finding the Fourth Proportional to 1,870.42, 2,801.97 and 1,138.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.42 : 2,801.97 = 1,138.18 : x
2. Step 2: Convert to fraction form
   1,870.42/2,801.97 = 1,138.18/x
3. Step 3: Cross multiply
   1,870.42x = 2,801.97 × 1,138.18
4. Step 4: Simplify right side
   1,870.42x = 3,189,146.21
5. Step 5: Solve for x
   x = 3,189,146.21/1,870.42
6. Step 6: Final answer
   x = 1,705.04