Finding the Fourth Proportional to 10,011.80, 14,997.20 and 5,620.04

Step by Step Solution

1. Step 1: Write the proportion equation
   10,011.80 : 14,997.20 = 5,620.04 : x
2. Step 2: Convert to fraction form
   10,011.80/14,997.20 = 5,620.04/x
3. Step 3: Cross multiply
   10,011.80x = 14,997.20 × 5,620.04
4. Step 4: Simplify right side
   10,011.80x = 84,284,863.89
5. Step 5: Solve for x
   x = 84,284,863.89/10,011.80
6. Step 6: Final answer
   x = 8,418.55