Finding the Fourth Proportional to 2,191.73, 3,287.72 and 1,573.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,191.73 : 3,287.72 = 1,573.90 : x
2. Step 2: Convert to fraction form
   2,191.73/3,287.72 = 1,573.90/x
3. Step 3: Cross multiply
   2,191.73x = 3,287.72 × 1,573.90
4. Step 4: Simplify right side
   2,191.73x = 5,174,538.22
5. Step 5: Solve for x
   x = 5,174,538.22/2,191.73
6. Step 6: Final answer
   x = 2,360.94