Finding the Fourth Proportional to 1,090.47, 1,504.89 and 624.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,090.47 : 1,504.89 = 624.81 : x
2. Step 2: Convert to fraction form
   1,090.47/1,504.89 = 624.81/x
3. Step 3: Cross multiply
   1,090.47x = 1,504.89 × 624.81
4. Step 4: Simplify right side
   1,090.47x = 940,270.32
5. Step 5: Solve for x
   x = 940,270.32/1,090.47
6. Step 6: Final answer
   x = 862.26