Finding the Fourth Proportional to 7,865.88, 10,846.92 and 5,478.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,865.88 : 10,846.92 = 5,478.72 : x
2. Step 2: Convert to fraction form
   7,865.88/10,846.92 = 5,478.72/x
3. Step 3: Cross multiply
   7,865.88x = 10,846.92 × 5,478.72
4. Step 4: Simplify right side
   7,865.88x = 59,427,237.54
5. Step 5: Solve for x
   x = 59,427,237.54/7,865.88
6. Step 6: Final answer
   x = 7,555.07