Finding the Fourth Proportional to 11,681.77, 17,499.96 and 10,372.81

Step by Step Solution

1. Step 1: Write the proportion equation
   11,681.77 : 17,499.96 = 10,372.81 : x
2. Step 2: Convert to fraction form
   11,681.77/17,499.96 = 10,372.81/x
3. Step 3: Cross multiply
   11,681.77x = 17,499.96 × 10,372.81
4. Step 4: Simplify right side
   11,681.77x = 181,523,760.09
5. Step 5: Solve for x
   x = 181,523,760.09/11,681.77
6. Step 6: Final answer
   x = 15,539.06