Finding the Fourth Proportional to 2,181.52, 3,007.62 and 1,435.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,181.52 : 3,007.62 = 1,435.21 : x
2. Step 2: Convert to fraction form
   2,181.52/3,007.62 = 1,435.21/x
3. Step 3: Cross multiply
   2,181.52x = 3,007.62 × 1,435.21
4. Step 4: Simplify right side
   2,181.52x = 4,316,566.30
5. Step 5: Solve for x
   x = 4,316,566.30/2,181.52
6. Step 6: Final answer
   x = 1,978.70