Finding the Fourth Proportional to 1,477.47, 2,215.71 and 490.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,477.47 : 2,215.71 = 490.05 : x
2. Step 2: Convert to fraction form
   1,477.47/2,215.71 = 490.05/x
3. Step 3: Cross multiply
   1,477.47x = 2,215.71 × 490.05
4. Step 4: Simplify right side
   1,477.47x = 1,085,814.22
5. Step 5: Solve for x
   x = 1,085,814.22/1,477.47
6. Step 6: Final answer
   x = 734.92