Finding the Fourth Proportional to 15,510.69, 21,404.79 and 8,437.37

Step by Step Solution

1. Step 1: Write the proportion equation
   15,510.69 : 21,404.79 = 8,437.37 : x
2. Step 2: Convert to fraction form
   15,510.69/21,404.79 = 8,437.37/x
3. Step 3: Cross multiply
   15,510.69x = 21,404.79 × 8,437.37
4. Step 4: Simplify right side
   15,510.69x = 180,600,025.98
5. Step 5: Solve for x
   x = 180,600,025.98/15,510.69
6. Step 6: Final answer
   x = 11,643.58