Finding the Fourth Proportional to 13,731.66, 18,949.59 and 7,443.99

Step by Step Solution

1. Step 1: Write the proportion equation
   13,731.66 : 18,949.59 = 7,443.99 : x
2. Step 2: Convert to fraction form
   13,731.66/18,949.59 = 7,443.99/x
3. Step 3: Cross multiply
   13,731.66x = 18,949.59 × 7,443.99
4. Step 4: Simplify right side
   13,731.66x = 141,060,558.46
5. Step 5: Solve for x
   x = 141,060,558.46/13,731.66
6. Step 6: Final answer
   x = 10,272.65