Finding the Fourth Proportional to 11,250.34, 16,911.94 and 10,438.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,250.34 : 16,911.94 = 10,438.72 : x
2. Step 2: Convert to fraction form
   11,250.34/16,911.94 = 10,438.72/x
3. Step 3: Cross multiply
   11,250.34x = 16,911.94 × 10,438.72
4. Step 4: Simplify right side
   11,250.34x = 176,539,006.32
5. Step 5: Solve for x
   x = 176,539,006.32/11,250.34
6. Step 6: Final answer
   x = 15,691.88