Finding the Fourth Proportional to 7,884.72, 10,870.76 and 6,463.12

Step by Step Solution

1. Step 1: Write the proportion equation
   7,884.72 : 10,870.76 = 6,463.12 : x
2. Step 2: Convert to fraction form
   7,884.72/10,870.76 = 6,463.12/x
3. Step 3: Cross multiply
   7,884.72x = 10,870.76 × 6,463.12
4. Step 4: Simplify right side
   7,884.72x = 70,259,026.37
5. Step 5: Solve for x
   x = 70,259,026.37/7,884.72
6. Step 6: Final answer
   x = 8,910.78