Finding the Fourth Proportional to 7,631.72, 10,528.18 and 4,978.12

Step by Step Solution

1. Step 1: Write the proportion equation
   7,631.72 : 10,528.18 = 4,978.12 : x
2. Step 2: Convert to fraction form
   7,631.72/10,528.18 = 4,978.12/x
3. Step 3: Cross multiply
   7,631.72x = 10,528.18 × 4,978.12
4. Step 4: Simplify right side
   7,631.72x = 52,410,543.42
5. Step 5: Solve for x
   x = 52,410,543.42/7,631.72
6. Step 6: Final answer
   x = 6,867.46