Finding the Fourth Proportional to 9,622.98, 13,279.98 and 5,431.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,622.98 : 13,279.98 = 5,431.50 : x
2. Step 2: Convert to fraction form
   9,622.98/13,279.98 = 5,431.50/x
3. Step 3: Cross multiply
   9,622.98x = 13,279.98 × 5,431.50
4. Step 4: Simplify right side
   9,622.98x = 72,130,211.37
5. Step 5: Solve for x
   x = 72,130,211.37/9,622.98
6. Step 6: Final answer
   x = 7,495.62