Finding the Fourth Proportional to 10,075.50, 15,111.63 and 7,144.92

Step by Step Solution

1. Step 1: Write the proportion equation
   10,075.50 : 15,111.63 = 7,144.92 : x
2. Step 2: Convert to fraction form
   10,075.50/15,111.63 = 7,144.92/x
3. Step 3: Cross multiply
   10,075.50x = 15,111.63 × 7,144.92
4. Step 4: Simplify right side
   10,075.50x = 107,971,387.42
5. Step 5: Solve for x
   x = 107,971,387.42/10,075.50
6. Step 6: Final answer
   x = 10,716.23