Finding the Fourth Proportional to 1,384.42, 1,910.36 and 1,123.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.42 : 1,910.36 = 1,123.06 : x
2. Step 2: Convert to fraction form
   1,384.42/1,910.36 = 1,123.06/x
3. Step 3: Cross multiply
   1,384.42x = 1,910.36 × 1,123.06
4. Step 4: Simplify right side
   1,384.42x = 2,145,448.90
5. Step 5: Solve for x
   x = 2,145,448.90/1,384.42
6. Step 6: Final answer
   x = 1,549.71