Finding the Fourth Proportional to 13,380.72, 18,465.56 and 7,412.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,380.72 : 18,465.56 = 7,412.50 : x
2. Step 2: Convert to fraction form
   13,380.72/18,465.56 = 7,412.50/x
3. Step 3: Cross multiply
   13,380.72x = 18,465.56 × 7,412.50
4. Step 4: Simplify right side
   13,380.72x = 136,875,963.50
5. Step 5: Solve for x
   x = 136,875,963.50/13,380.72
6. Step 6: Final answer
   x = 10,229.34