Finding the Fourth Proportional to 1,384.44, 1,905.90 and 1,200.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.44 : 1,905.90 = 1,200.48 : x
2. Step 2: Convert to fraction form
   1,384.44/1,905.90 = 1,200.48/x
3. Step 3: Cross multiply
   1,384.44x = 1,905.90 × 1,200.48
4. Step 4: Simplify right side
   1,384.44x = 2,287,994.83
5. Step 5: Solve for x
   x = 2,287,994.83/1,384.44
6. Step 6: Final answer
   x = 1,652.65