Finding the Fourth Proportional to 19,021.53, 28,526.72 and 7,166.75

Step by Step Solution

1. Step 1: Write the proportion equation
   19,021.53 : 28,526.72 = 7,166.75 : x
2. Step 2: Convert to fraction form
   19,021.53/28,526.72 = 7,166.75/x
3. Step 3: Cross multiply
   19,021.53x = 28,526.72 × 7,166.75
4. Step 4: Simplify right side
   19,021.53x = 204,443,870.56
5. Step 5: Solve for x
   x = 204,443,870.56/19,021.53
6. Step 6: Final answer
   x = 10,748.02