Finding the Fourth Proportional to 9,901.06, 13,662.60 and 5,424.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,901.06 : 13,662.60 = 5,424.72 : x
2. Step 2: Convert to fraction form
   9,901.06/13,662.60 = 5,424.72/x
3. Step 3: Cross multiply
   9,901.06x = 13,662.60 × 5,424.72
4. Step 4: Simplify right side
   9,901.06x = 74,115,779.47
5. Step 5: Solve for x
   x = 74,115,779.47/9,901.06
6. Step 6: Final answer
   x = 7,485.64