Finding the Fourth Proportional to 1,788.21, 2,467.50 and 1,042.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,788.21 : 2,467.50 = 1,042.30 : x
2. Step 2: Convert to fraction form
   1,788.21/2,467.50 = 1,042.30/x
3. Step 3: Cross multiply
   1,788.21x = 2,467.50 × 1,042.30
4. Step 4: Simplify right side
   1,788.21x = 2,571,874.43
5. Step 5: Solve for x
   x = 2,571,874.43/1,788.21
6. Step 6: Final answer
   x = 1,438.24