Finding the Fourth Proportional to 1,731.86, 2,591.70 and 1,491.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,731.86 : 2,591.70 = 1,491.30 : x
2. Step 2: Convert to fraction form
   1,731.86/2,591.70 = 1,491.30/x
3. Step 3: Cross multiply
   1,731.86x = 2,591.70 × 1,491.30
4. Step 4: Simplify right side
   1,731.86x = 3,865,002.21
5. Step 5: Solve for x
   x = 3,865,002.21/1,731.86
6. Step 6: Final answer
   x = 2,231.71