Finding the Fourth Proportional to 20,799.98, 31,199.93 and 5,005

Step by Step Solution

1. Step 1: Write the proportion equation
   20,799.98 : 31,199.93 = 5,005 : x
2. Step 2: Convert to fraction form
   20,799.98/31,199.93 = 5,005/x
3. Step 3: Cross multiply
   20,799.98x = 31,199.93 × 5,005
4. Step 4: Simplify right side
   20,799.98x = 156,155,649.65
5. Step 5: Solve for x
   x = 156,155,649.65/20,799.98
6. Step 6: Final answer
   x = 7,507.49