Finding the Fourth Proportional to 1,538.49, 2,123.99 and 1,015.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,538.49 : 2,123.99 = 1,015.43 : x
2. Step 2: Convert to fraction form
   1,538.49/2,123.99 = 1,015.43/x
3. Step 3: Cross multiply
   1,538.49x = 2,123.99 × 1,015.43
4. Step 4: Simplify right side
   1,538.49x = 2,156,771.01
5. Step 5: Solve for x
   x = 2,156,771.01/1,538.49
6. Step 6: Final answer
   x = 1,401.88