Finding the Fourth Proportional to 1,410.42, 2,109.69 and 1,213.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,410.42 : 2,109.69 = 1,213.86 : x
2. Step 2: Convert to fraction form
   1,410.42/2,109.69 = 1,213.86/x
3. Step 3: Cross multiply
   1,410.42x = 2,109.69 × 1,213.86
4. Step 4: Simplify right side
   1,410.42x = 2,560,868.30
5. Step 5: Solve for x
   x = 2,560,868.30/1,410.42
6. Step 6: Final answer
   x = 1,815.68