Finding the Fourth Proportional to 1,451.90, 2,003.61 and 788.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,451.90 : 2,003.61 = 788.75 : x
2. Step 2: Convert to fraction form
   1,451.90/2,003.61 = 788.75/x
3. Step 3: Cross multiply
   1,451.90x = 2,003.61 × 788.75
4. Step 4: Simplify right side
   1,451.90x = 1,580,337.37
5. Step 5: Solve for x
   x = 1,580,337.37/1,451.90
6. Step 6: Final answer
   x = 1,088.47