Finding the Fourth Proportional to 1,870.74, 2,803 and 1,138.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.74 : 2,803 = 1,138.10 : x
2. Step 2: Convert to fraction form
   1,870.74/2,803 = 1,138.10/x
3. Step 3: Cross multiply
   1,870.74x = 2,803 × 1,138.10
4. Step 4: Simplify right side
   1,870.74x = 3,190,094.30
5. Step 5: Solve for x
   x = 3,190,094.30/1,870.74
6. Step 6: Final answer
   x = 1,705.26