Finding the Fourth Proportional to 1,421.67, 2,131.25 and 599.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,421.67 : 2,131.25 = 599.50 : x
2. Step 2: Convert to fraction form
   1,421.67/2,131.25 = 599.50/x
3. Step 3: Cross multiply
   1,421.67x = 2,131.25 × 599.50
4. Step 4: Simplify right side
   1,421.67x = 1,277,673.72
5. Step 5: Solve for x
   x = 1,277,673.72/1,421.67
6. Step 6: Final answer
   x = 898.71