Finding the Fourth Proportional to 82,748.28, 114,190.38 and 45,021.72

Step by Step Solution

1. Step 1: Write the proportion equation
   82,748.28 : 114,190.38 = 45,021.72 : x
2. Step 2: Convert to fraction form
   82,748.28/114,190.38 = 45,021.72/x
3. Step 3: Cross multiply
   82,748.28x = 114,190.38 × 45,021.72
4. Step 4: Simplify right side
   82,748.28x = 5,141,047,315.05
5. Step 5: Solve for x
   x = 5,141,047,315.05/82,748.28
6. Step 6: Final answer
   x = 62,128.75