Finding the Fourth Proportional to 22,459.28, 30,975.60 and 19,764.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,459.28 : 30,975.60 = 19,764.72 : x
2. Step 2: Convert to fraction form
   22,459.28/30,975.60 = 19,764.72/x
3. Step 3: Cross multiply
   22,459.28x = 30,975.60 × 19,764.72
4. Step 4: Simplify right side
   22,459.28x = 612,224,060.83
5. Step 5: Solve for x
   x = 612,224,060.83/22,459.28
6. Step 6: Final answer
   x = 27,259.29