Finding the Fourth Proportional to 1,451.76, 2,003.40 and 788.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,451.76 : 2,003.40 = 788.62 : x
2. Step 2: Convert to fraction form
   1,451.76/2,003.40 = 788.62/x
3. Step 3: Cross multiply
   1,451.76x = 2,003.40 × 788.62
4. Step 4: Simplify right side
   1,451.76x = 1,579,920.06
5. Step 5: Solve for x
   x = 1,579,920.06/1,451.76
6. Step 6: Final answer
   x = 1,088.28