Finding the Fourth Proportional to 13,280.72, 18,327.24 and 7,312.23

Step by Step Solution

1. Step 1: Write the proportion equation
   13,280.72 : 18,327.24 = 7,312.23 : x
2. Step 2: Convert to fraction form
   13,280.72/18,327.24 = 7,312.23/x
3. Step 3: Cross multiply
   13,280.72x = 18,327.24 × 7,312.23
4. Step 4: Simplify right side
   13,280.72x = 134,012,994.15
5. Step 5: Solve for x
   x = 134,012,994.15/13,280.72
6. Step 6: Final answer
   x = 10,090.80