Finding the Fourth Proportional to 1,543.78, 2,315.89 and 503.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,543.78 : 2,315.89 = 503.52 : x
2. Step 2: Convert to fraction form
   1,543.78/2,315.89 = 503.52/x
3. Step 3: Cross multiply
   1,543.78x = 2,315.89 × 503.52
4. Step 4: Simplify right side
   1,543.78x = 1,166,096.93
5. Step 5: Solve for x
   x = 1,166,096.93/1,543.78
6. Step 6: Final answer
   x = 755.35