Finding the Fourth Proportional to 13,429.74, 18,532.98 and 8,123.01

Step by Step Solution

1. Step 1: Write the proportion equation
   13,429.74 : 18,532.98 = 8,123.01 : x
2. Step 2: Convert to fraction form
   13,429.74/18,532.98 = 8,123.01/x
3. Step 3: Cross multiply
   13,429.74x = 18,532.98 × 8,123.01
4. Step 4: Simplify right side
   13,429.74x = 150,543,581.87
5. Step 5: Solve for x
   x = 150,543,581.87/13,429.74
6. Step 6: Final answer
   x = 11,209.72