Finding the Fourth Proportional to 13,072.46, 18,039.50 and 7,103.99

Step by Step Solution

1. Step 1: Write the proportion equation
   13,072.46 : 18,039.50 = 7,103.99 : x
2. Step 2: Convert to fraction form
   13,072.46/18,039.50 = 7,103.99/x
3. Step 3: Cross multiply
   13,072.46x = 18,039.50 × 7,103.99
4. Step 4: Simplify right side
   13,072.46x = 128,152,463.82
5. Step 5: Solve for x
   x = 128,152,463.82/13,072.46
6. Step 6: Final answer
   x = 9,803.24