Finding the Fourth Proportional to 7,485.36, 10,329.34 and 4,128.32

Step by Step Solution

1. Step 1: Write the proportion equation
   7,485.36 : 10,329.34 = 4,128.32 : x
2. Step 2: Convert to fraction form
   7,485.36/10,329.34 = 4,128.32/x
3. Step 3: Cross multiply
   7,485.36x = 10,329.34 × 4,128.32
4. Step 4: Simplify right side
   7,485.36x = 42,642,820.91
5. Step 5: Solve for x
   x = 42,642,820.91/7,485.36
6. Step 6: Final answer
   x = 5,696.83