Finding the Fourth Proportional to 2,085.02, 3,128.07 and 786.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.02 : 3,128.07 = 786.50 : x
2. Step 2: Convert to fraction form
   2,085.02/3,128.07 = 786.50/x
3. Step 3: Cross multiply
   2,085.02x = 3,128.07 × 786.50
4. Step 4: Simplify right side
   2,085.02x = 2,460,227.06
5. Step 5: Solve for x
   x = 2,460,227.06/2,085.02
6. Step 6: Final answer
   x = 1,179.95