Finding the Fourth Proportional to 9,599.99, 13,247.93 and 5,620.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,599.99 : 13,247.93 = 5,620.31 : x
2. Step 2: Convert to fraction form
   9,599.99/13,247.93 = 5,620.31/x
3. Step 3: Cross multiply
   9,599.99x = 13,247.93 × 5,620.31
4. Step 4: Simplify right side
   9,599.99x = 74,457,421.27
5. Step 5: Solve for x
   x = 74,457,421.27/9,599.99
6. Step 6: Final answer
   x = 7,755.99