Finding the Fourth Proportional to 10,985.55, 16,564.50 and 10,067.01

Step by Step Solution

1. Step 1: Write the proportion equation
   10,985.55 : 16,564.50 = 10,067.01 : x
2. Step 2: Convert to fraction form
   10,985.55/16,564.50 = 10,067.01/x
3. Step 3: Cross multiply
   10,985.55x = 16,564.50 × 10,067.01
4. Step 4: Simplify right side
   10,985.55x = 166,754,987.15
5. Step 5: Solve for x
   x = 166,754,987.15/10,985.55
6. Step 6: Final answer
   x = 15,179.48