Finding the Fourth Proportional to 9,922.78, 14,884.50 and 4,989.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,922.78 : 14,884.50 = 4,989.72 : x
2. Step 2: Convert to fraction form
   9,922.78/14,884.50 = 4,989.72/x
3. Step 3: Cross multiply
   9,922.78x = 14,884.50 × 4,989.72
4. Step 4: Simplify right side
   9,922.78x = 74,269,487.34
5. Step 5: Solve for x
   x = 74,269,487.34/9,922.78
6. Step 6: Final answer
   x = 7,484.75