Finding the Fourth Proportional to 13,447.17, 18,557.00 and 7,478.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,447.17 : 18,557.00 = 7,478.82 : x
2. Step 2: Convert to fraction form
   13,447.17/18,557.00 = 7,478.82/x
3. Step 3: Cross multiply
   13,447.17x = 18,557.00 × 7,478.82
4. Step 4: Simplify right side
   13,447.17x = 138,784,425.35
5. Step 5: Solve for x
   x = 138,784,425.35/13,447.17
6. Step 6: Final answer
   x = 10,320.72