Finding the Fourth Proportional to 1,788.30, 2,465.31 and 1,227.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,788.30 : 2,465.31 = 1,227.87 : x
2. Step 2: Convert to fraction form
   1,788.30/2,465.31 = 1,227.87/x
3. Step 3: Cross multiply
   1,788.30x = 2,465.31 × 1,227.87
4. Step 4: Simplify right side
   1,788.30x = 3,027,080.19
5. Step 5: Solve for x
   x = 3,027,080.19/1,788.30
6. Step 6: Final answer
   x = 1,692.71