Finding the Fourth Proportional to 1,385.28, 1,912.50 and 1,014.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.28 : 1,912.50 = 1,014.21 : x
2. Step 2: Convert to fraction form
   1,385.28/1,912.50 = 1,014.21/x
3. Step 3: Cross multiply
   1,385.28x = 1,912.50 × 1,014.21
4. Step 4: Simplify right side
   1,385.28x = 1,939,676.63
5. Step 5: Solve for x
   x = 1,939,676.63/1,385.28
6. Step 6: Final answer
   x = 1,400.21