Finding the Fourth Proportional to 1,918.05, 2,875.84 and 1,259.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,918.05 : 2,875.84 = 1,259.15 : x
2. Step 2: Convert to fraction form
   1,918.05/2,875.84 = 1,259.15/x
3. Step 3: Cross multiply
   1,918.05x = 2,875.84 × 1,259.15
4. Step 4: Simplify right side
   1,918.05x = 3,621,096.41
5. Step 5: Solve for x
   x = 3,621,096.41/1,918.05
6. Step 6: Final answer
   x = 1,887.91