Finding the Fourth Proportional to 139,886.19, 193,036.89 and 79,456.64

Step by Step Solution

1. Step 1: Write the proportion equation
   139,886.19 : 193,036.89 = 79,456.64 : x
2. Step 2: Convert to fraction form
   139,886.19/193,036.89 = 79,456.64/x
3. Step 3: Cross multiply
   139,886.19x = 193,036.89 × 79,456.64
4. Step 4: Simplify right side
   139,886.19x = 15,338,062,675.45
5. Step 5: Solve for x
   x = 15,338,062,675.45/139,886.19
6. Step 6: Final answer
   x = 109,646.73