Finding the Fourth Proportional to 1,445.59, 1,995.42 and 921.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.59 : 1,995.42 = 921.52 : x
2. Step 2: Convert to fraction form
   1,445.59/1,995.42 = 921.52/x
3. Step 3: Cross multiply
   1,445.59x = 1,995.42 × 921.52
4. Step 4: Simplify right side
   1,445.59x = 1,838,819.44
5. Step 5: Solve for x
   x = 1,838,819.44/1,445.59
6. Step 6: Final answer
   x = 1,272.02