Finding the Fourth Proportional to 1,434.10, 1,981.62 and 1,120.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.10 : 1,981.62 = 1,120.12 : x
2. Step 2: Convert to fraction form
   1,434.10/1,981.62 = 1,120.12/x
3. Step 3: Cross multiply
   1,434.10x = 1,981.62 × 1,120.12
4. Step 4: Simplify right side
   1,434.10x = 2,219,652.19
5. Step 5: Solve for x
   x = 2,219,652.19/1,434.10
6. Step 6: Final answer
   x = 1,547.77