Finding the Fourth Proportional to 9,520.34, 13,137.57 and 5,213.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,520.34 : 13,137.57 = 5,213.31 : x
2. Step 2: Convert to fraction form
   9,520.34/13,137.57 = 5,213.31/x
3. Step 3: Cross multiply
   9,520.34x = 13,137.57 × 5,213.31
4. Step 4: Simplify right side
   9,520.34x = 68,490,225.06
5. Step 5: Solve for x
   x = 68,490,225.06/9,520.34
6. Step 6: Final answer
   x = 7,194.09