Finding the Fourth Proportional to 13,498.86, 18,618.37 and 9,912.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,498.86 : 18,618.37 = 9,912.69 : x
2. Step 2: Convert to fraction form
   13,498.86/18,618.37 = 9,912.69/x
3. Step 3: Cross multiply
   13,498.86x = 18,618.37 × 9,912.69
4. Step 4: Simplify right side
   13,498.86x = 184,558,130.12
5. Step 5: Solve for x
   x = 184,558,130.12/13,498.86
6. Step 6: Final answer
   x = 13,672.13