Finding the Fourth Proportional to 5,620.41, 8,426.06 and 5,005.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,620.41 : 8,426.06 = 5,005.31 : x
2. Step 2: Convert to fraction form
   5,620.41/8,426.06 = 5,005.31/x
3. Step 3: Cross multiply
   5,620.41x = 8,426.06 × 5,005.31
4. Step 4: Simplify right side
   5,620.41x = 42,175,017.35
5. Step 5: Solve for x
   x = 42,175,017.35/5,620.41
6. Step 6: Final answer
   x = 7,503.90