Finding the Fourth Proportional to 138,817, 191,552.76 and 78,383.98

Step by Step Solution

1. Step 1: Write the proportion equation
   138,817 : 191,552.76 = 78,383.98 : x
2. Step 2: Convert to fraction form
   138,817/191,552.76 = 78,383.98/x
3. Step 3: Cross multiply
   138,817x = 191,552.76 × 78,383.98
4. Step 4: Simplify right side
   138,817x = 15,014,667,708.78
5. Step 5: Solve for x
   x = 15,014,667,708.78/138,817
6. Step 6: Final answer
   x = 108,161.59