Finding the Fourth Proportional to 1,521.94, 2,099.94 and 990.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,521.94 : 2,099.94 = 990.77 : x
2. Step 2: Convert to fraction form
   1,521.94/2,099.94 = 990.77/x
3. Step 3: Cross multiply
   1,521.94x = 2,099.94 × 990.77
4. Step 4: Simplify right side
   1,521.94x = 2,080,547.05
5. Step 5: Solve for x
   x = 2,080,547.05/1,521.94
6. Step 6: Final answer
   x = 1,367.04