Finding the Fourth Proportional to 2,085.42, 3,125.28 and 786.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.42 : 3,125.28 = 786.18 : x
2. Step 2: Convert to fraction form
   2,085.42/3,125.28 = 786.18/x
3. Step 3: Cross multiply
   2,085.42x = 3,125.28 × 786.18
4. Step 4: Simplify right side
   2,085.42x = 2,457,032.63
5. Step 5: Solve for x
   x = 2,457,032.63/2,085.42
6. Step 6: Final answer
   x = 1,178.20