Finding the Fourth Proportional to 1,118.76, 1,678.34 and 469.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,118.76 : 1,678.34 = 469.56 : x
2. Step 2: Convert to fraction form
   1,118.76/1,678.34 = 469.56/x
3. Step 3: Cross multiply
   1,118.76x = 1,678.34 × 469.56
4. Step 4: Simplify right side
   1,118.76x = 788,081.33
5. Step 5: Solve for x
   x = 788,081.33/1,118.76
6. Step 6: Final answer
   x = 704.42