Finding the Fourth Proportional to 7,070.61, 10,599.42 and 3,172.89

Step by Step Solution

1. Step 1: Write the proportion equation
   7,070.61 : 10,599.42 = 3,172.89 : x
2. Step 2: Convert to fraction form
   7,070.61/10,599.42 = 3,172.89/x
3. Step 3: Cross multiply
   7,070.61x = 10,599.42 × 3,172.89
4. Step 4: Simplify right side
   7,070.61x = 33,630,793.72
5. Step 5: Solve for x
   x = 33,630,793.72/7,070.61
6. Step 6: Final answer
   x = 4,756.42