Finding the Fourth Proportional to 1,591.42, 2,191.16 and 1,445.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.42 : 2,191.16 = 1,445.62 : x
2. Step 2: Convert to fraction form
   1,591.42/2,191.16 = 1,445.62/x
3. Step 3: Cross multiply
   1,591.42x = 2,191.16 × 1,445.62
4. Step 4: Simplify right side
   1,591.42x = 3,167,584.72
5. Step 5: Solve for x
   x = 3,167,584.72/1,591.42
6. Step 6: Final answer
   x = 1,990.41