Finding the Fourth Proportional to 9,989.89, 13,785.57 and 5,737.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,989.89 : 13,785.57 = 5,737.96 : x
2. Step 2: Convert to fraction form
   9,989.89/13,785.57 = 5,737.96/x
3. Step 3: Cross multiply
   9,989.89x = 13,785.57 × 5,737.96
4. Step 4: Simplify right side
   9,989.89x = 79,101,066.47
5. Step 5: Solve for x
   x = 79,101,066.47/9,989.89
6. Step 6: Final answer
   x = 7,918.11