Finding the Fourth Proportional to 9,075.75, 12,510.06 and 7,158.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,075.75 : 12,510.06 = 7,158.42 : x
2. Step 2: Convert to fraction form
   9,075.75/12,510.06 = 7,158.42/x
3. Step 3: Cross multiply
   9,075.75x = 12,510.06 × 7,158.42
4. Step 4: Simplify right side
   9,075.75x = 89,552,263.71
5. Step 5: Solve for x
   x = 89,552,263.71/9,075.75
6. Step 6: Final answer
   x = 9,867.20