Finding the Fourth Proportional to 10,897.88, 16,352.72 and 8,437.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,897.88 : 16,352.72 = 8,437.50 : x
2. Step 2: Convert to fraction form
   10,897.88/16,352.72 = 8,437.50/x
3. Step 3: Cross multiply
   10,897.88x = 16,352.72 × 8,437.50
4. Step 4: Simplify right side
   10,897.88x = 137,976,064.45
5. Step 5: Solve for x
   x = 137,976,064.45/10,897.88
6. Step 6: Final answer
   x = 12,660.82