Finding the Fourth Proportional to 1,383.40, 1,911.52 and 1,105.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.40 : 1,911.52 = 1,105.93 : x
2. Step 2: Convert to fraction form
   1,383.40/1,911.52 = 1,105.93/x
3. Step 3: Cross multiply
   1,383.40x = 1,911.52 × 1,105.93
4. Step 4: Simplify right side
   1,383.40x = 2,113,997.76
5. Step 5: Solve for x
   x = 2,113,997.76/1,383.40
6. Step 6: Final answer
   x = 1,528.12