Finding the Fourth Proportional to 123,970.32, 171,117.71 and 72,979.05

Step by Step Solution

1. Step 1: Write the proportion equation
   123,970.32 : 171,117.71 = 72,979.05 : x
2. Step 2: Convert to fraction form
   123,970.32/171,117.71 = 72,979.05/x
3. Step 3: Cross multiply
   123,970.32x = 171,117.71 × 72,979.05
4. Step 4: Simplify right side
   123,970.32x = 12,488,008,393.68
5. Step 5: Solve for x
   x = 12,488,008,393.68/123,970.32
6. Step 6: Final answer
   x = 100,733.85