Finding the Fourth Proportional to 1,308.58, 1,805.93 and 719.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.58 : 1,805.93 = 719.12 : x
2. Step 2: Convert to fraction form
   1,308.58/1,805.93 = 719.12/x
3. Step 3: Cross multiply
   1,308.58x = 1,805.93 × 719.12
4. Step 4: Simplify right side
   1,308.58x = 1,298,680.38
5. Step 5: Solve for x
   x = 1,298,680.38/1,308.58
6. Step 6: Final answer
   x = 992.43