Finding the Fourth Proportional to 120,123.50, 165,805.07 and 79,317.54

Step by Step Solution

1. Step 1: Write the proportion equation
   120,123.50 : 165,805.07 = 79,317.54 : x
2. Step 2: Convert to fraction form
   120,123.50/165,805.07 = 79,317.54/x
3. Step 3: Cross multiply
   120,123.50x = 165,805.07 × 79,317.54
4. Step 4: Simplify right side
   120,123.50x = 13,151,249,875.34
5. Step 5: Solve for x
   x = 13,151,249,875.34/120,123.50
6. Step 6: Final answer
   x = 109,481.08