Finding the Fourth Proportional to 15,624.50, 21,561.86 and 8,551.31

Step by Step Solution

1. Step 1: Write the proportion equation
   15,624.50 : 21,561.86 = 8,551.31 : x
2. Step 2: Convert to fraction form
   15,624.50/21,561.86 = 8,551.31/x
3. Step 3: Cross multiply
   15,624.50x = 21,561.86 × 8,551.31
4. Step 4: Simplify right side
   15,624.50x = 184,382,062.61
5. Step 5: Solve for x
   x = 184,382,062.61/15,624.50
6. Step 6: Final answer
   x = 11,800.83