Finding the Fourth Proportional to 1,428.05, 2,141.55 and 503.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428.05 : 2,141.55 = 503.43 : x
2. Step 2: Convert to fraction form
   1,428.05/2,141.55 = 503.43/x
3. Step 3: Cross multiply
   1,428.05x = 2,141.55 × 503.43
4. Step 4: Simplify right side
   1,428.05x = 1,078,120.52
5. Step 5: Solve for x
   x = 1,078,120.52/1,428.05
6. Step 6: Final answer
   x = 754.96