Finding the Fourth Proportional to 9,978.89, 14,954.22 and 5,538.51

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.89 : 14,954.22 = 5,538.51 : x
2. Step 2: Convert to fraction form
   9,978.89/14,954.22 = 5,538.51/x
3. Step 3: Cross multiply
   9,978.89x = 14,954.22 × 5,538.51
4. Step 4: Simplify right side
   9,978.89x = 82,824,097.01
5. Step 5: Solve for x
   x = 82,824,097.01/9,978.89
6. Step 6: Final answer
   x = 8,299.94