Finding the Fourth Proportional to 11,278.98, 16,920.72 and 3,487.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,278.98 : 16,920.72 = 3,487.50 : x
2. Step 2: Convert to fraction form
   11,278.98/16,920.72 = 3,487.50/x
3. Step 3: Cross multiply
   11,278.98x = 16,920.72 × 3,487.50
4. Step 4: Simplify right side
   11,278.98x = 59,011,011.00
5. Step 5: Solve for x
   x = 59,011,011.00/11,278.98
6. Step 6: Final answer
   x = 5,231.95