Finding the Fourth Proportional to 1,300.84, 1,950.78 and 521.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.84 : 1,950.78 = 521.02 : x
2. Step 2: Convert to fraction form
   1,300.84/1,950.78 = 521.02/x
3. Step 3: Cross multiply
   1,300.84x = 1,950.78 × 521.02
4. Step 4: Simplify right side
   1,300.84x = 1,016,395.40
5. Step 5: Solve for x
   x = 1,016,395.40/1,300.84
6. Step 6: Final answer
   x = 781.34