Finding the Fourth Proportional to 10,389.12, 15,571.29 and 5,997.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,389.12 : 15,571.29 = 5,997.30 : x
2. Step 2: Convert to fraction form
   10,389.12/15,571.29 = 5,997.30/x
3. Step 3: Cross multiply
   10,389.12x = 15,571.29 × 5,997.30
4. Step 4: Simplify right side
   10,389.12x = 93,385,697.52
5. Step 5: Solve for x
   x = 93,385,697.52/10,389.12
6. Step 6: Final answer
   x = 8,988.80