Finding the Fourth Proportional to 13,407.39, 18,500.72 and 7,437.57

Step by Step Solution

1. Step 1: Write the proportion equation
   13,407.39 : 18,500.72 = 7,437.57 : x
2. Step 2: Convert to fraction form
   13,407.39/18,500.72 = 7,437.57/x
3. Step 3: Cross multiply
   13,407.39x = 18,500.72 × 7,437.57
4. Step 4: Simplify right side
   13,407.39x = 137,600,362.86
5. Step 5: Solve for x
   x = 137,600,362.86/13,407.39
6. Step 6: Final answer
   x = 10,263.02