Finding the Fourth Proportional to 1,510.77, 2,086.05 and 979.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,510.77 : 2,086.05 = 979.91 : x
2. Step 2: Convert to fraction form
   1,510.77/2,086.05 = 979.91/x
3. Step 3: Cross multiply
   1,510.77x = 2,086.05 × 979.91
4. Step 4: Simplify right side
   1,510.77x = 2,044,125.93
5. Step 5: Solve for x
   x = 2,044,125.93/1,510.77
6. Step 6: Final answer
   x = 1,353.04