Finding the Fourth Proportional to 2,661.63, 3,992.51 and 930.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,661.63 : 3,992.51 = 930.25 : x
2. Step 2: Convert to fraction form
   2,661.63/3,992.51 = 930.25/x
3. Step 3: Cross multiply
   2,661.63x = 3,992.51 × 930.25
4. Step 4: Simplify right side
   2,661.63x = 3,714,032.43
5. Step 5: Solve for x
   x = 3,714,032.43/2,661.63
6. Step 6: Final answer
   x = 1,395.40