Finding the Fourth Proportional to 65,287.71, 89,510.27 and 64,106.73

Step by Step Solution

1. Step 1: Write the proportion equation
   65,287.71 : 89,510.27 = 64,106.73 : x
2. Step 2: Convert to fraction form
   65,287.71/89,510.27 = 64,106.73/x
3. Step 3: Cross multiply
   65,287.71x = 89,510.27 × 64,106.73
4. Step 4: Simplify right side
   65,287.71x = 5,738,210,711.12
5. Step 5: Solve for x
   x = 5,738,210,711.12/65,287.71
6. Step 6: Final answer
   x = 87,891.13