Finding the Fourth Proportional to 1,788.72, 2,468.34 and 1,002.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,788.72 : 2,468.34 = 1,002.78 : x
2. Step 2: Convert to fraction form
   1,788.72/2,468.34 = 1,002.78/x
3. Step 3: Cross multiply
   1,788.72x = 2,468.34 × 1,002.78
4. Step 4: Simplify right side
   1,788.72x = 2,475,201.99
5. Step 5: Solve for x
   x = 2,475,201.99/1,788.72
6. Step 6: Final answer
   x = 1,383.78