Finding the Fourth Proportional to 2,220.42, 3,059.46 and 1,590.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,220.42 : 3,059.46 = 1,590.42 : x
2. Step 2: Convert to fraction form
   2,220.42/3,059.46 = 1,590.42/x
3. Step 3: Cross multiply
   2,220.42x = 3,059.46 × 1,590.42
4. Step 4: Simplify right side
   2,220.42x = 4,865,826.37
5. Step 5: Solve for x
   x = 4,865,826.37/2,220.42
6. Step 6: Final answer
   x = 2,191.40