Finding the Fourth Proportional to 10,447.76, 15,672.17 and 3,427.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,447.76 : 15,672.17 = 3,427.15 : x
2. Step 2: Convert to fraction form
   10,447.76/15,672.17 = 3,427.15/x
3. Step 3: Cross multiply
   10,447.76x = 15,672.17 × 3,427.15
4. Step 4: Simplify right side
   10,447.76x = 53,710,877.42
5. Step 5: Solve for x
   x = 53,710,877.42/10,447.76
6. Step 6: Final answer
   x = 5,140.90