Finding the Fourth Proportional to 7,290.05, 10,059.12 and 4,145.63

Step by Step Solution

1. Step 1: Write the proportion equation
   7,290.05 : 10,059.12 = 4,145.63 : x
2. Step 2: Convert to fraction form
   7,290.05/10,059.12 = 4,145.63/x
3. Step 3: Cross multiply
   7,290.05x = 10,059.12 × 4,145.63
4. Step 4: Simplify right side
   7,290.05x = 41,701,339.35
5. Step 5: Solve for x
   x = 41,701,339.35/7,290.05
6. Step 6: Final answer
   x = 5,720.31