Finding the Fourth Proportional to 1,071.82, 1,606.69 and 486.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,071.82 : 1,606.69 = 486.98 : x
2. Step 2: Convert to fraction form
   1,071.82/1,606.69 = 486.98/x
3. Step 3: Cross multiply
   1,071.82x = 1,606.69 × 486.98
4. Step 4: Simplify right side
   1,071.82x = 782,416.65
5. Step 5: Solve for x
   x = 782,416.65/1,071.82
6. Step 6: Final answer
   x = 729.99