Finding the Fourth Proportional to 1,308.01, 1,805.00 and 718.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.01 : 1,805.00 = 718.51 : x
2. Step 2: Convert to fraction form
   1,308.01/1,805.00 = 718.51/x
3. Step 3: Cross multiply
   1,308.01x = 1,805.00 × 718.51
4. Step 4: Simplify right side
   1,308.01x = 1,296,897.93
5. Step 5: Solve for x
   x = 1,296,897.93/1,308.01
6. Step 6: Final answer
   x = 991.51