Finding the Fourth Proportional to 17,064.96, 23,549.76 and 9,991.50

Step by Step Solution

1. Step 1: Write the proportion equation
   17,064.96 : 23,549.76 = 9,991.50 : x
2. Step 2: Convert to fraction form
   17,064.96/23,549.76 = 9,991.50/x
3. Step 3: Cross multiply
   17,064.96x = 23,549.76 × 9,991.50
4. Step 4: Simplify right side
   17,064.96x = 235,297,427.04
5. Step 5: Solve for x
   x = 235,297,427.04/17,064.96
6. Step 6: Final answer
   x = 13,788.34