Finding the Fourth Proportional to 13,123.08, 19,690.02 and 7,272.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,123.08 : 19,690.02 = 7,272.72 : x
2. Step 2: Convert to fraction form
   13,123.08/19,690.02 = 7,272.72/x
3. Step 3: Cross multiply
   13,123.08x = 19,690.02 × 7,272.72
4. Step 4: Simplify right side
   13,123.08x = 143,200,002.25
5. Step 5: Solve for x
   x = 143,200,002.25/13,123.08
6. Step 6: Final answer
   x = 10,912.07