Finding the Fourth Proportional to 2,087.02, 3,131.07 and 788.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.02 : 3,131.07 = 788.50 : x
2. Step 2: Convert to fraction form
   2,087.02/3,131.07 = 788.50/x
3. Step 3: Cross multiply
   2,087.02x = 3,131.07 × 788.50
4. Step 4: Simplify right side
   2,087.02x = 2,468,848.70
5. Step 5: Solve for x
   x = 2,468,848.70/2,087.02
6. Step 6: Final answer
   x = 1,182.95