Finding the Fourth Proportional to 9,072.35, 12,522.46 and 5,487.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,072.35 : 12,522.46 = 5,487.31 : x
2. Step 2: Convert to fraction form
   9,072.35/12,522.46 = 5,487.31/x
3. Step 3: Cross multiply
   9,072.35x = 12,522.46 × 5,487.31
4. Step 4: Simplify right side
   9,072.35x = 68,714,619.98
5. Step 5: Solve for x
   x = 68,714,619.98/9,072.35
6. Step 6: Final answer
   x = 7,574.07