Finding the Fourth Proportional to 10,072.20, 13,899.95 and 5,596.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,072.20 : 13,899.95 = 5,596.31 : x
2. Step 2: Convert to fraction form
   10,072.20/13,899.95 = 5,596.31/x
3. Step 3: Cross multiply
   10,072.20x = 13,899.95 × 5,596.31
4. Step 4: Simplify right side
   10,072.20x = 77,788,429.18
5. Step 5: Solve for x
   x = 77,788,429.18/10,072.20
6. Step 6: Final answer
   x = 7,723.08