Finding the Fourth Proportional to 1,445.54, 1,994.83 and 921.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.54 : 1,994.83 = 921.87 : x
2. Step 2: Convert to fraction form
   1,445.54/1,994.83 = 921.87/x
3. Step 3: Cross multiply
   1,445.54x = 1,994.83 × 921.87
4. Step 4: Simplify right side
   1,445.54x = 1,838,973.93
5. Step 5: Solve for x
   x = 1,838,973.93/1,445.54
6. Step 6: Final answer
   x = 1,272.18