Finding the Fourth Proportional to 11,051.25, 16,554.71 and 5,487.77

Step by Step Solution

1. Step 1: Write the proportion equation
   11,051.25 : 16,554.71 = 5,487.77 : x
2. Step 2: Convert to fraction form
   11,051.25/16,554.71 = 5,487.77/x
3. Step 3: Cross multiply
   11,051.25x = 16,554.71 × 5,487.77
4. Step 4: Simplify right side
   11,051.25x = 90,848,330.68
5. Step 5: Solve for x
   x = 90,848,330.68/11,051.25
6. Step 6: Final answer
   x = 8,220.64