Finding the Fourth Proportional to 1,018.01, 1,404.90 and 624.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.01 : 1,404.90 = 624.75 : x
2. Step 2: Convert to fraction form
   1,018.01/1,404.90 = 624.75/x
3. Step 3: Cross multiply
   1,018.01x = 1,404.90 × 624.75
4. Step 4: Simplify right side
   1,018.01x = 877,711.28
5. Step 5: Solve for x
   x = 877,711.28/1,018.01
6. Step 6: Final answer
   x = 862.19