Finding the Fourth Proportional to 20,688.89, 31,035.29 and 5,899.91

Step by Step Solution

1. Step 1: Write the proportion equation
   20,688.89 : 31,035.29 = 5,899.91 : x
2. Step 2: Convert to fraction form
   20,688.89/31,035.29 = 5,899.91/x
3. Step 3: Cross multiply
   20,688.89x = 31,035.29 × 5,899.91
4. Step 4: Simplify right side
   20,688.89x = 183,105,233.15
5. Step 5: Solve for x
   x = 183,105,233.15/20,688.89
6. Step 6: Final answer
   x = 8,850.42