Finding the Fourth Proportional to 2,086.62, 3,130.38 and 788.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.62 : 3,130.38 = 788.10 : x
2. Step 2: Convert to fraction form
   2,086.62/3,130.38 = 788.10/x
3. Step 3: Cross multiply
   2,086.62x = 3,130.38 × 788.10
4. Step 4: Simplify right side
   2,086.62x = 2,467,052.48
5. Step 5: Solve for x
   x = 2,467,052.48/2,086.62
6. Step 6: Final answer
   x = 1,182.32