Finding the Fourth Proportional to 139,058.82, 191,900.01 and 78,641.33

Step by Step Solution

1. Step 1: Write the proportion equation
   139,058.82 : 191,900.01 = 78,641.33 : x
2. Step 2: Convert to fraction form
   139,058.82/191,900.01 = 78,641.33/x
3. Step 3: Cross multiply
   139,058.82x = 191,900.01 × 78,641.33
4. Step 4: Simplify right side
   139,058.82x = 15,091,270,660.71
5. Step 5: Solve for x
   x = 15,091,270,660.71/139,058.82
6. Step 6: Final answer
   x = 108,524.37