Finding the Fourth Proportional to 15,510.61, 21,404.69 and 8,437.03

Step by Step Solution

1. Step 1: Write the proportion equation
   15,510.61 : 21,404.69 = 8,437.03 : x
2. Step 2: Convert to fraction form
   15,510.61/21,404.69 = 8,437.03/x
3. Step 3: Cross multiply
   15,510.61x = 21,404.69 × 8,437.03
4. Step 4: Simplify right side
   15,510.61x = 180,591,947.61
5. Step 5: Solve for x
   x = 180,591,947.61/15,510.61
6. Step 6: Final answer
   x = 11,643.13