Finding the Fourth Proportional to 1,401.12, 1,931.34 and 1,120.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.12 : 1,931.34 = 1,120.47 : x
2. Step 2: Convert to fraction form
   1,401.12/1,931.34 = 1,120.47/x
3. Step 3: Cross multiply
   1,401.12x = 1,931.34 × 1,120.47
4. Step 4: Simplify right side
   1,401.12x = 2,164,008.53
5. Step 5: Solve for x
   x = 2,164,008.53/1,401.12
6. Step 6: Final answer
   x = 1,544.48