Finding the Fourth Proportional to 2,085.86, 3,130.16 and 787.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.86 : 3,130.16 = 787.34 : x
2. Step 2: Convert to fraction form
   2,085.86/3,130.16 = 787.34/x
3. Step 3: Cross multiply
   2,085.86x = 3,130.16 × 787.34
4. Step 4: Simplify right side
   2,085.86x = 2,464,480.59
5. Step 5: Solve for x
   x = 2,464,480.59/2,085.86
6. Step 6: Final answer
   x = 1,181.52