Finding the Fourth Proportional to 1,451.83, 2,003.56 and 788.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,451.83 : 2,003.56 = 788.72 : x
2. Step 2: Convert to fraction form
   1,451.83/2,003.56 = 788.72/x
3. Step 3: Cross multiply
   1,451.83x = 2,003.56 × 788.72
4. Step 4: Simplify right side
   1,451.83x = 1,580,247.84
5. Step 5: Solve for x
   x = 1,580,247.84/1,451.83
6. Step 6: Final answer
   x = 1,088.45