Finding the Fourth Proportional to 3,390.76, 5,085.53 and 925.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,390.76 : 5,085.53 = 925.27 : x
2. Step 2: Convert to fraction form
   3,390.76/5,085.53 = 925.27/x
3. Step 3: Cross multiply
   3,390.76x = 5,085.53 × 925.27
4. Step 4: Simplify right side
   3,390.76x = 4,705,508.28
5. Step 5: Solve for x
   x = 4,705,508.28/3,390.76
6. Step 6: Final answer
   x = 1,387.74