Finding the Fourth Proportional to 1,488.21, 2,055.42 and 1,015.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.21 : 2,055.42 = 1,015.30 : x
2. Step 2: Convert to fraction form
   1,488.21/2,055.42 = 1,015.30/x
3. Step 3: Cross multiply
   1,488.21x = 2,055.42 × 1,015.30
4. Step 4: Simplify right side
   1,488.21x = 2,086,858.98
5. Step 5: Solve for x
   x = 2,086,858.98/1,488.21
6. Step 6: Final answer
   x = 1,402.26