Finding the Fourth Proportional to 120,123.72, 165,775.41 and 79,767.90

Step by Step Solution

1. Step 1: Write the proportion equation
   120,123.72 : 165,775.41 = 79,767.90 : x
2. Step 2: Convert to fraction form
   120,123.72/165,775.41 = 79,767.90/x
3. Step 3: Cross multiply
   120,123.72x = 165,775.41 × 79,767.90
4. Step 4: Simplify right side
   120,123.72x = 13,223,556,327.34
5. Step 5: Solve for x
   x = 13,223,556,327.34/120,123.72
6. Step 6: Final answer
   x = 110,082.81