Finding the Fourth Proportional to 1,438.30, 2,154.49 and 851.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,438.30 : 2,154.49 = 851.52 : x
2. Step 2: Convert to fraction form
   1,438.30/2,154.49 = 851.52/x
3. Step 3: Cross multiply
   1,438.30x = 2,154.49 × 851.52
4. Step 4: Simplify right side
   1,438.30x = 1,834,591.32
5. Step 5: Solve for x
   x = 1,834,591.32/1,438.30
6. Step 6: Final answer
   x = 1,275.53