Finding the Fourth Proportional to 1,085.34, 1,497.87 and 619.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.34 : 1,497.87 = 619.50 : x
2. Step 2: Convert to fraction form
   1,085.34/1,497.87 = 619.50/x
3. Step 3: Cross multiply
   1,085.34x = 1,497.87 × 619.50
4. Step 4: Simplify right side
   1,085.34x = 927,930.47
5. Step 5: Solve for x
   x = 927,930.47/1,085.34
6. Step 6: Final answer
   x = 854.97