Finding the Fourth Proportional to 1,087.02, 1,499.94 and 621.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.02 : 1,499.94 = 621.24 : x
2. Step 2: Convert to fraction form
   1,087.02/1,499.94 = 621.24/x
3. Step 3: Cross multiply
   1,087.02x = 1,499.94 × 621.24
4. Step 4: Simplify right side
   1,087.02x = 931,822.73
5. Step 5: Solve for x
   x = 931,822.73/1,087.02
6. Step 6: Final answer
   x = 857.23