Finding the Fourth Proportional to 1,300.83, 1,950.78 and 521.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.83 : 1,950.78 = 521.01 : x
2. Step 2: Convert to fraction form
   1,300.83/1,950.78 = 521.01/x
3. Step 3: Cross multiply
   1,300.83x = 1,950.78 × 521.01
4. Step 4: Simplify right side
   1,300.83x = 1,016,375.89
5. Step 5: Solve for x
   x = 1,016,375.89/1,300.83
6. Step 6: Final answer
   x = 781.33