Finding the Fourth Proportional to 109,667.70, 164,566.35 and 72,335.70

Step by Step Solution

1. Step 1: Write the proportion equation
   109,667.70 : 164,566.35 = 72,335.70 : x
2. Step 2: Convert to fraction form
   109,667.70/164,566.35 = 72,335.70/x
3. Step 3: Cross multiply
   109,667.70x = 164,566.35 × 72,335.70
4. Step 4: Simplify right side
   109,667.70x = 11,904,022,123.70
5. Step 5: Solve for x
   x = 11,904,022,123.70/109,667.70
6. Step 6: Final answer
   x = 108,546.29