Finding the Fourth Proportional to 1,489.71, 2,223.72 and 1,379.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,489.71 : 2,223.72 = 1,379.91 : x
2. Step 2: Convert to fraction form
   1,489.71/2,223.72 = 1,379.91/x
3. Step 3: Cross multiply
   1,489.71x = 2,223.72 × 1,379.91
4. Step 4: Simplify right side
   1,489.71x = 3,068,533.47
5. Step 5: Solve for x
   x = 3,068,533.47/1,489.71
6. Step 6: Final answer
   x = 2,059.82