Finding the Fourth Proportional to 1,491.98, 2,238.71 and 1,128.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,491.98 : 2,238.71 = 1,128.99 : x
2. Step 2: Convert to fraction form
   1,491.98/2,238.71 = 1,128.99/x
3. Step 3: Cross multiply
   1,491.98x = 2,238.71 × 1,128.99
4. Step 4: Simplify right side
   1,491.98x = 2,527,475.56
5. Step 5: Solve for x
   x = 2,527,475.56/1,491.98
6. Step 6: Final answer
   x = 1,694.05