Finding the Fourth Proportional to 2,009.02, 3,012.37 and 621.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,009.02 : 3,012.37 = 621.98 : x
2. Step 2: Convert to fraction form
   2,009.02/3,012.37 = 621.98/x
3. Step 3: Cross multiply
   2,009.02x = 3,012.37 × 621.98
4. Step 4: Simplify right side
   2,009.02x = 1,873,633.89
5. Step 5: Solve for x
   x = 1,873,633.89/2,009.02
6. Step 6: Final answer
   x = 932.61