Finding the Fourth Proportional to 11,446.25, 17,178.16 and 5,123.09

Step by Step Solution

1. Step 1: Write the proportion equation
   11,446.25 : 17,178.16 = 5,123.09 : x
2. Step 2: Convert to fraction form
   11,446.25/17,178.16 = 5,123.09/x
3. Step 3: Cross multiply
   11,446.25x = 17,178.16 × 5,123.09
4. Step 4: Simplify right side
   11,446.25x = 88,005,259.71
5. Step 5: Solve for x
   x = 88,005,259.71/11,446.25
6. Step 6: Final answer
   x = 7,688.57