Finding the Fourth Proportional to 1,014.63, 1,520.91 and 397.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,014.63 : 1,520.91 = 397.50 : x
2. Step 2: Convert to fraction form
   1,014.63/1,520.91 = 397.50/x
3. Step 3: Cross multiply
   1,014.63x = 1,520.91 × 397.50
4. Step 4: Simplify right side
   1,014.63x = 604,556.02
5. Step 5: Solve for x
   x = 604,556.02/1,014.63
6. Step 6: Final answer
   x = 595.84