Finding the Fourth Proportional to 1,085.82, 1,498.95 and 619.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.82 : 1,498.95 = 619.98 : x
2. Step 2: Convert to fraction form
   1,085.82/1,498.95 = 619.98/x
3. Step 3: Cross multiply
   1,085.82x = 1,498.95 × 619.98
4. Step 4: Simplify right side
   1,085.82x = 929,319.02
5. Step 5: Solve for x
   x = 929,319.02/1,085.82
6. Step 6: Final answer
   x = 855.87