Finding the Fourth Proportional to 13,672.69, 18,868.32 and 7,385.06

Step by Step Solution

1. Step 1: Write the proportion equation
   13,672.69 : 18,868.32 = 7,385.06 : x
2. Step 2: Convert to fraction form
   13,672.69/18,868.32 = 7,385.06/x
3. Step 3: Cross multiply
   13,672.69x = 18,868.32 × 7,385.06
4. Step 4: Simplify right side
   13,672.69x = 139,343,722.47
5. Step 5: Solve for x
   x = 139,343,722.47/13,672.69
6. Step 6: Final answer
   x = 10,191.39