Finding the Fourth Proportional to 1,903.89, 2,640.83 and 1,853.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,903.89 : 2,640.83 = 1,853.34 : x
2. Step 2: Convert to fraction form
   1,903.89/2,640.83 = 1,853.34/x
3. Step 3: Cross multiply
   1,903.89x = 2,640.83 × 1,853.34
4. Step 4: Simplify right side
   1,903.89x = 4,894,346.61
5. Step 5: Solve for x
   x = 4,894,346.61/1,903.89
6. Step 6: Final answer
   x = 2,570.71