Finding the Fourth Proportional to 10,290.80, 14,201.28 and 5,575.08

Step by Step Solution

1. Step 1: Write the proportion equation
   10,290.80 : 14,201.28 = 5,575.08 : x
2. Step 2: Convert to fraction form
   10,290.80/14,201.28 = 5,575.08/x
3. Step 3: Cross multiply
   10,290.80x = 14,201.28 × 5,575.08
4. Step 4: Simplify right side
   10,290.80x = 79,173,272.10
5. Step 5: Solve for x
   x = 79,173,272.10/10,290.80
6. Step 6: Final answer
   x = 7,693.60