Finding the Fourth Proportional to 13,564.57, 18,699.83 and 9,973.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,564.57 : 18,699.83 = 9,973.18 : x
2. Step 2: Convert to fraction form
   13,564.57/18,699.83 = 9,973.18/x
3. Step 3: Cross multiply
   13,564.57x = 18,699.83 × 9,973.18
4. Step 4: Simplify right side
   13,564.57x = 186,496,770.56
5. Step 5: Solve for x
   x = 186,496,770.56/13,564.57
6. Step 6: Final answer
   x = 13,748.82