Finding the Fourth Proportional to 20,565.55, 30,856.56 and 8,088.72

Step by Step Solution

1. Step 1: Write the proportion equation
   20,565.55 : 30,856.56 = 8,088.72 : x
2. Step 2: Convert to fraction form
   20,565.55/30,856.56 = 8,088.72/x
3. Step 3: Cross multiply
   20,565.55x = 30,856.56 × 8,088.72
4. Step 4: Simplify right side
   20,565.55x = 249,590,074.00
5. Step 5: Solve for x
   x = 249,590,074.00/20,565.55
6. Step 6: Final answer
   x = 12,136.32