Finding the Fourth Proportional to 1,274.13, 1,910.59 and 543.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,274.13 : 1,910.59 = 543.31 : x
2. Step 2: Convert to fraction form
   1,274.13/1,910.59 = 543.31/x
3. Step 3: Cross multiply
   1,274.13x = 1,910.59 × 543.31
4. Step 4: Simplify right side
   1,274.13x = 1,038,036.52
5. Step 5: Solve for x
   x = 1,038,036.52/1,274.13
6. Step 6: Final answer
   x = 814.70