Finding the Fourth Proportional to 9,623.25, 13,280.31 and 5,431.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,623.25 : 13,280.31 = 5,431.50 : x
2. Step 2: Convert to fraction form
   9,623.25/13,280.31 = 5,431.50/x
3. Step 3: Cross multiply
   9,623.25x = 13,280.31 × 5,431.50
4. Step 4: Simplify right side
   9,623.25x = 72,132,003.77
5. Step 5: Solve for x
   x = 72,132,003.77/9,623.25
6. Step 6: Final answer
   x = 7,495.60