Finding the Fourth Proportional to 1,036.23, 1,553.59 and 342.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.23 : 1,553.59 = 342.69 : x
2. Step 2: Convert to fraction form
   1,036.23/1,553.59 = 342.69/x
3. Step 3: Cross multiply
   1,036.23x = 1,553.59 × 342.69
4. Step 4: Simplify right side
   1,036.23x = 532,399.76
5. Step 5: Solve for x
   x = 532,399.76/1,036.23
6. Step 6: Final answer
   x = 513.79