Finding the Fourth Proportional to 8,970.96, 12,380.00 and 5,431.71

Step by Step Solution

1. Step 1: Write the proportion equation
   8,970.96 : 12,380.00 = 5,431.71 : x
2. Step 2: Convert to fraction form
   8,970.96/12,380.00 = 5,431.71/x
3. Step 3: Cross multiply
   8,970.96x = 12,380.00 × 5,431.71
4. Step 4: Simplify right side
   8,970.96x = 67,244,542.64
5. Step 5: Solve for x
   x = 67,244,542.64/8,970.96
6. Step 6: Final answer
   x = 7,495.80