Finding the Fourth Proportional to 1,384.60, 1,908.46 and 1,122.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.60 : 1,908.46 = 1,122.16 : x
2. Step 2: Convert to fraction form
   1,384.60/1,908.46 = 1,122.16/x
3. Step 3: Cross multiply
   1,384.60x = 1,908.46 × 1,122.16
4. Step 4: Simplify right side
   1,384.60x = 2,141,597.47
5. Step 5: Solve for x
   x = 2,141,597.47/1,384.60
6. Step 6: Final answer
   x = 1,546.73