Finding the Fourth Proportional to 109,910.78, 164,780.03 and 43,400.69

Step by Step Solution

1. Step 1: Write the proportion equation
   109,910.78 : 164,780.03 = 43,400.69 : x
2. Step 2: Convert to fraction form
   109,910.78/164,780.03 = 43,400.69/x
3. Step 3: Cross multiply
   109,910.78x = 164,780.03 × 43,400.69
4. Step 4: Simplify right side
   109,910.78x = 7,151,567,000.22
5. Step 5: Solve for x
   x = 7,151,567,000.22/109,910.78
6. Step 6: Final answer
   x = 65,067.02