Finding the Fourth Proportional to 1,513.73, 2,088.41 and 990.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,513.73 : 2,088.41 = 990.07 : x
2. Step 2: Convert to fraction form
   1,513.73/2,088.41 = 990.07/x
3. Step 3: Cross multiply
   1,513.73x = 2,088.41 × 990.07
4. Step 4: Simplify right side
   1,513.73x = 2,067,669.34
5. Step 5: Solve for x
   x = 2,067,669.34/1,513.73
6. Step 6: Final answer
   x = 1,365.94