Finding the Fourth Proportional to 13,412.82, 18,510.63 and 7,445.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,412.82 : 18,510.63 = 7,445.15 : x
2. Step 2: Convert to fraction form
   13,412.82/18,510.63 = 7,445.15/x
3. Step 3: Cross multiply
   13,412.82x = 18,510.63 × 7,445.15
4. Step 4: Simplify right side
   13,412.82x = 137,814,365.89
5. Step 5: Solve for x
   x = 137,814,365.89/13,412.82
6. Step 6: Final answer
   x = 10,274.82