Finding the Fourth Proportional to 2,290.48, 3,160.88 and 1,406.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.48 : 3,160.88 = 1,406.86 : x
2. Step 2: Convert to fraction form
   2,290.48/3,160.88 = 1,406.86/x
3. Step 3: Cross multiply
   2,290.48x = 3,160.88 × 1,406.86
4. Step 4: Simplify right side
   2,290.48x = 4,446,915.64
5. Step 5: Solve for x
   x = 4,446,915.64/2,290.48
6. Step 6: Final answer
   x = 1,941.48