Finding the Fourth Proportional to 1,445.02, 1,993.83 and 920.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.02 : 1,993.83 = 920.86 : x
2. Step 2: Convert to fraction form
   1,445.02/1,993.83 = 920.86/x
3. Step 3: Cross multiply
   1,445.02x = 1,993.83 × 920.86
4. Step 4: Simplify right side
   1,445.02x = 1,836,038.29
5. Step 5: Solve for x
   x = 1,836,038.29/1,445.02
6. Step 6: Final answer
   x = 1,270.60