Finding the Fourth Proportional to 10,665.57, 15,997.60 and 4,000.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,665.57 : 15,997.60 = 4,000.69 : x
2. Step 2: Convert to fraction form
   10,665.57/15,997.60 = 4,000.69/x
3. Step 3: Cross multiply
   10,665.57x = 15,997.60 × 4,000.69
4. Step 4: Simplify right side
   10,665.57x = 64,001,463.34
5. Step 5: Solve for x
   x = 64,001,463.34/10,665.57
6. Step 6: Final answer
   x = 6,000.75