Finding the Fourth Proportional to 82,860.54, 114,390.82 and 64,672.20

Step by Step Solution

1. Step 1: Write the proportion equation
   82,860.54 : 114,390.82 = 64,672.20 : x
2. Step 2: Convert to fraction form
   82,860.54/114,390.82 = 64,672.20/x
3. Step 3: Cross multiply
   82,860.54x = 114,390.82 × 64,672.20
4. Step 4: Simplify right side
   82,860.54x = 7,397,905,989.20
5. Step 5: Solve for x
   x = 7,397,905,989.20/82,860.54
6. Step 6: Final answer
   x = 89,281.41