Finding the Fourth Proportional to 115,962.09, 160,030.23 and 64,978.65

Step by Step Solution

1. Step 1: Write the proportion equation
   115,962.09 : 160,030.23 = 64,978.65 : x
2. Step 2: Convert to fraction form
   115,962.09/160,030.23 = 64,978.65/x
3. Step 3: Cross multiply
   115,962.09x = 160,030.23 × 64,978.65
4. Step 4: Simplify right side
   115,962.09x = 10,398,548,304.59
5. Step 5: Solve for x
   x = 10,398,548,304.59/115,962.09
6. Step 6: Final answer
   x = 89,671.96