Finding the Fourth Proportional to 1,523.39, 2,284.89 and 427.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,523.39 : 2,284.89 = 427.83 : x
2. Step 2: Convert to fraction form
   1,523.39/2,284.89 = 427.83/x
3. Step 3: Cross multiply
   1,523.39x = 2,284.89 × 427.83
4. Step 4: Simplify right side
   1,523.39x = 977,534.32
5. Step 5: Solve for x
   x = 977,534.32/1,523.39
6. Step 6: Final answer
   x = 641.69