Finding the Fourth Proportional to 1,975.83, 2,961.38 and 920.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,975.83 : 2,961.38 = 920.21 : x
2. Step 2: Convert to fraction form
   1,975.83/2,961.38 = 920.21/x
3. Step 3: Cross multiply
   1,975.83x = 2,961.38 × 920.21
4. Step 4: Simplify right side
   1,975.83x = 2,725,086.89
5. Step 5: Solve for x
   x = 2,725,086.89/1,975.83
6. Step 6: Final answer
   x = 1,379.21