Finding the Fourth Proportional to 21,783.61, 32,527.86 and 17,290.87

Step by Step Solution

1. Step 1: Write the proportion equation
   21,783.61 : 32,527.86 = 17,290.87 : x
2. Step 2: Convert to fraction form
   21,783.61/32,527.86 = 17,290.87/x
3. Step 3: Cross multiply
   21,783.61x = 32,527.86 × 17,290.87
4. Step 4: Simplify right side
   21,783.61x = 562,434,749.54
5. Step 5: Solve for x
   x = 562,434,749.54/21,783.61
6. Step 6: Final answer
   x = 25,819.18