Finding the Fourth Proportional to 1,451.71, 2,003.34 and 788.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,451.71 : 2,003.34 = 788.56 : x
2. Step 2: Convert to fraction form
   1,451.71/2,003.34 = 788.56/x
3. Step 3: Cross multiply
   1,451.71x = 2,003.34 × 788.56
4. Step 4: Simplify right side
   1,451.71x = 1,579,743.77
5. Step 5: Solve for x
   x = 1,579,743.77/1,451.71
6. Step 6: Final answer
   x = 1,088.20