Finding the Fourth Proportional to 1,407.03, 2,107.83 and 788.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.03 : 2,107.83 = 788.87 : x
2. Step 2: Convert to fraction form
   1,407.03/2,107.83 = 788.87/x
3. Step 3: Cross multiply
   1,407.03x = 2,107.83 × 788.87
4. Step 4: Simplify right side
   1,407.03x = 1,662,793.31
5. Step 5: Solve for x
   x = 1,662,793.31/1,407.03
6. Step 6: Final answer
   x = 1,181.78