Finding the Fourth Proportional to 139,059.82, 191,901.38 and 78,642.33

Step by Step Solution

1. Step 1: Write the proportion equation
   139,059.82 : 191,901.38 = 78,642.33 : x
2. Step 2: Convert to fraction form
   139,059.82/191,901.38 = 78,642.33/x
3. Step 3: Cross multiply
   139,059.82x = 191,901.38 × 78,642.33
4. Step 4: Simplify right side
   139,059.82x = 15,091,571,653.42
5. Step 5: Solve for x
   x = 15,091,571,653.42/139,059.82
6. Step 6: Final answer
   x = 108,525.75