Finding the Fourth Proportional to 1,008.79, 1,514.00 and 521.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.79 : 1,514.00 = 521.98 : x
2. Step 2: Convert to fraction form
   1,008.79/1,514.00 = 521.98/x
3. Step 3: Cross multiply
   1,008.79x = 1,514.00 × 521.98
4. Step 4: Simplify right side
   1,008.79x = 790,267.54
5. Step 5: Solve for x
   x = 790,267.54/1,008.79
6. Step 6: Final answer
   x = 783.39