Finding the Fourth Proportional to 1,017.91, 1,404.72 and 552.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.91 : 1,404.72 = 552.16 : x
2. Step 2: Convert to fraction form
   1,017.91/1,404.72 = 552.16/x
3. Step 3: Cross multiply
   1,017.91x = 1,404.72 × 552.16
4. Step 4: Simplify right side
   1,017.91x = 775,631.95
5. Step 5: Solve for x
   x = 775,631.95/1,017.91
6. Step 6: Final answer
   x = 761.98