Finding the Fourth Proportional to 13,697.04, 18,901.98 and 7,728.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,697.04 : 18,901.98 = 7,728.96 : x
2. Step 2: Convert to fraction form
   13,697.04/18,901.98 = 7,728.96/x
3. Step 3: Cross multiply
   13,697.04x = 18,901.98 × 7,728.96
4. Step 4: Simplify right side
   13,697.04x = 146,092,647.34
5. Step 5: Solve for x
   x = 146,092,647.34/13,697.04
6. Step 6: Final answer
   x = 10,666.00