Finding the Fourth Proportional to 11,075.60, 16,624.34 and 7,128.07

Step by Step Solution

1. Step 1: Write the proportion equation
   11,075.60 : 16,624.34 = 7,128.07 : x
2. Step 2: Convert to fraction form
   11,075.60/16,624.34 = 7,128.07/x
3. Step 3: Cross multiply
   11,075.60x = 16,624.34 × 7,128.07
4. Step 4: Simplify right side
   11,075.60x = 118,499,408.75
5. Step 5: Solve for x
   x = 118,499,408.75/11,075.60
6. Step 6: Final answer
   x = 10,699.14