Finding the Fourth Proportional to 13,730.52, 18,947.61 and 7,442.76

Step by Step Solution

1. Step 1: Write the proportion equation
   13,730.52 : 18,947.61 = 7,442.76 : x
2. Step 2: Convert to fraction form
   13,730.52/18,947.61 = 7,442.76/x
3. Step 3: Cross multiply
   13,730.52x = 18,947.61 × 7,442.76
4. Step 4: Simplify right side
   13,730.52x = 141,022,513.80
5. Step 5: Solve for x
   x = 141,022,513.80/13,730.52
6. Step 6: Final answer
   x = 10,270.73