Finding the Fourth Proportional to 123,820.34, 170,872.75 and 67,231.72

Step by Step Solution

1. Step 1: Write the proportion equation
   123,820.34 : 170,872.75 = 67,231.72 : x
2. Step 2: Convert to fraction form
   123,820.34/170,872.75 = 67,231.72/x
3. Step 3: Cross multiply
   123,820.34x = 170,872.75 × 67,231.72
4. Step 4: Simplify right side
   123,820.34x = 11,488,068,883.63
5. Step 5: Solve for x
   x = 11,488,068,883.63/123,820.34
6. Step 6: Final answer
   x = 92,780.14