Finding the Fourth Proportional to 1,451.91, 2,003.63 and 788.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,451.91 : 2,003.63 = 788.76 : x
2. Step 2: Convert to fraction form
   1,451.91/2,003.63 = 788.76/x
3. Step 3: Cross multiply
   1,451.91x = 2,003.63 × 788.76
4. Step 4: Simplify right side
   1,451.91x = 1,580,379.26
5. Step 5: Solve for x
   x = 1,580,379.26/1,451.91
6. Step 6: Final answer
   x = 1,088.48