Finding the Fourth Proportional to 2,522.30, 3,779.40 and 2,109.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,522.30 : 3,779.40 = 2,109.20 : x
2. Step 2: Convert to fraction form
   2,522.30/3,779.40 = 2,109.20/x
3. Step 3: Cross multiply
   2,522.30x = 3,779.40 × 2,109.20
4. Step 4: Simplify right side
   2,522.30x = 7,971,510.48
5. Step 5: Solve for x
   x = 7,971,510.48/2,522.30
6. Step 6: Final answer
   x = 3,160.41