Finding the Fourth Proportional to 1,300.97, 1,950.12 and 521.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.97 : 1,950.12 = 521.51 : x
2. Step 2: Convert to fraction form
   1,300.97/1,950.12 = 521.51/x
3. Step 3: Cross multiply
   1,300.97x = 1,950.12 × 521.51
4. Step 4: Simplify right side
   1,300.97x = 1,016,997.33
5. Step 5: Solve for x
   x = 1,016,997.33/1,300.97
6. Step 6: Final answer
   x = 781.73