Finding the Fourth Proportional to 139,886.25, 193,036.98 and 79,456.71

Step by Step Solution

1. Step 1: Write the proportion equation
   139,886.25 : 193,036.98 = 79,456.71 : x
2. Step 2: Convert to fraction form
   139,886.25/193,036.98 = 79,456.71/x
3. Step 3: Cross multiply
   139,886.25x = 193,036.98 × 79,456.71
4. Step 4: Simplify right side
   139,886.25x = 15,338,083,339.14
5. Step 5: Solve for x
   x = 15,338,083,339.14/139,886.25
6. Step 6: Final answer
   x = 109,646.83