Finding the Fourth Proportional to 1,869.49, 2,579.81 and 1,030.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,869.49 : 2,579.81 = 1,030.15 : x
2. Step 2: Convert to fraction form
   1,869.49/2,579.81 = 1,030.15/x
3. Step 3: Cross multiply
   1,869.49x = 2,579.81 × 1,030.15
4. Step 4: Simplify right side
   1,869.49x = 2,657,591.27
5. Step 5: Solve for x
   x = 2,657,591.27/1,869.49
6. Step 6: Final answer
   x = 1,421.56