Finding the Fourth Proportional to 1,018.69, 1,526.33 and 980.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.69 : 1,526.33 = 980.77 : x
2. Step 2: Convert to fraction form
   1,018.69/1,526.33 = 980.77/x
3. Step 3: Cross multiply
   1,018.69x = 1,526.33 × 980.77
4. Step 4: Simplify right side
   1,018.69x = 1,496,978.67
5. Step 5: Solve for x
   x = 1,496,978.67/1,018.69
6. Step 6: Final answer
   x = 1,469.51