Finding the Fourth Proportional to 1,435.74, 1,981.35 and 1,121.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.74 : 1,981.35 = 1,121.37 : x
2. Step 2: Convert to fraction form
   1,435.74/1,981.35 = 1,121.37/x
3. Step 3: Cross multiply
   1,435.74x = 1,981.35 × 1,121.37
4. Step 4: Simplify right side
   1,435.74x = 2,221,826.45
5. Step 5: Solve for x
   x = 2,221,826.45/1,435.74
6. Step 6: Final answer
   x = 1,547.51