Finding the Fourth Proportional to 10,663.50, 16,001.01 and 5,191.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,663.50 : 16,001.01 = 5,191.50 : x
2. Step 2: Convert to fraction form
   10,663.50/16,001.01 = 5,191.50/x
3. Step 3: Cross multiply
   10,663.50x = 16,001.01 × 5,191.50
4. Step 4: Simplify right side
   10,663.50x = 83,069,243.42
5. Step 5: Solve for x
   x = 83,069,243.42/10,663.50
6. Step 6: Final answer
   x = 7,790.05