Finding the Fourth Proportional to 13,050.50, 18,003.71 and 7,742.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,050.50 : 18,003.71 = 7,742.30 : x
2. Step 2: Convert to fraction form
   13,050.50/18,003.71 = 7,742.30/x
3. Step 3: Cross multiply
   13,050.50x = 18,003.71 × 7,742.30
4. Step 4: Simplify right side
   13,050.50x = 139,390,123.93
5. Step 5: Solve for x
   x = 139,390,123.93/13,050.50
6. Step 6: Final answer
   x = 10,680.83