Finding the Fourth Proportional to 1,909.37, 2,865.09 and 1,903.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,909.37 : 2,865.09 = 1,903.56 : x
2. Step 2: Convert to fraction form
   1,909.37/2,865.09 = 1,903.56/x
3. Step 3: Cross multiply
   1,909.37x = 2,865.09 × 1,903.56
4. Step 4: Simplify right side
   1,909.37x = 5,453,870.72
5. Step 5: Solve for x
   x = 5,453,870.72/1,909.37
6. Step 6: Final answer
   x = 2,856.38