Finding the Fourth Proportional to 109,608.70, 164,234.85 and 99,111.10

Step by Step Solution

1. Step 1: Write the proportion equation
   109,608.70 : 164,234.85 = 99,111.10 : x
2. Step 2: Convert to fraction form
   109,608.70/164,234.85 = 99,111.10/x
3. Step 3: Cross multiply
   109,608.70x = 164,234.85 × 99,111.10
4. Step 4: Simplify right side
   109,608.70x = 16,277,496,641.84
5. Step 5: Solve for x
   x = 16,277,496,641.84/109,608.70
6. Step 6: Final answer
   x = 148,505.52