Finding the Fourth Proportional to 83,608.61, 115,291.94 and 64,491.48

Step by Step Solution

1. Step 1: Write the proportion equation
   83,608.61 : 115,291.94 = 64,491.48 : x
2. Step 2: Convert to fraction form
   83,608.61/115,291.94 = 64,491.48/x
3. Step 3: Cross multiply
   83,608.61x = 115,291.94 × 64,491.48
4. Step 4: Simplify right side
   83,608.61x = 7,435,347,520.21
5. Step 5: Solve for x
   x = 7,435,347,520.21/83,608.61
6. Step 6: Final answer
   x = 88,930.41