Finding the Fourth Proportional to 1,521.82, 2,100.50 and 992.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,521.82 : 2,100.50 = 992.15 : x
2. Step 2: Convert to fraction form
   1,521.82/2,100.50 = 992.15/x
3. Step 3: Cross multiply
   1,521.82x = 2,100.50 × 992.15
4. Step 4: Simplify right side
   1,521.82x = 2,084,011.08
5. Step 5: Solve for x
   x = 2,084,011.08/1,521.82
6. Step 6: Final answer
   x = 1,369.42