Finding the Fourth Proportional to 1,570.22, 2,353.89 and 543.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.22 : 2,353.89 = 543.50 : x
2. Step 2: Convert to fraction form
   1,570.22/2,353.89 = 543.50/x
3. Step 3: Cross multiply
   1,570.22x = 2,353.89 × 543.50
4. Step 4: Simplify right side
   1,570.22x = 1,279,339.22
5. Step 5: Solve for x
   x = 1,279,339.22/1,570.22
6. Step 6: Final answer
   x = 814.75