Finding the Fourth Proportional to 173,980.28, 260,978.52 and 79,171.40

Step by Step Solution

1. Step 1: Write the proportion equation
   173,980.28 : 260,978.52 = 79,171.40 : x
2. Step 2: Convert to fraction form
   173,980.28/260,978.52 = 79,171.40/x
3. Step 3: Cross multiply
   173,980.28x = 260,978.52 × 79,171.40
4. Step 4: Simplify right side
   173,980.28x = 20,662,034,798.33
5. Step 5: Solve for x
   x = 20,662,034,798.33/173,980.28
6. Step 6: Final answer
   x = 118,760.79