Finding the Fourth Proportional to 1,408.32, 2,111.94 and 830.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.32 : 2,111.94 = 830.52 : x
2. Step 2: Convert to fraction form
   1,408.32/2,111.94 = 830.52/x
3. Step 3: Cross multiply
   1,408.32x = 2,111.94 × 830.52
4. Step 4: Simplify right side
   1,408.32x = 1,754,008.41
5. Step 5: Solve for x
   x = 1,754,008.41/1,408.32
6. Step 6: Final answer
   x = 1,245.46