Finding the Fourth Proportional to 2,085.87, 3,127.96 and 930.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.87 : 3,127.96 = 930.81 : x
2. Step 2: Convert to fraction form
   2,085.87/3,127.96 = 930.81/x
3. Step 3: Cross multiply
   2,085.87x = 3,127.96 × 930.81
4. Step 4: Simplify right side
   2,085.87x = 2,911,536.45
5. Step 5: Solve for x
   x = 2,911,536.45/2,085.87
6. Step 6: Final answer
   x = 1,395.84