Finding the Fourth Proportional to 189,768.96, 261,905.40 and 109,170.72

Step by Step Solution

1. Step 1: Write the proportion equation
   189,768.96 : 261,905.40 = 109,170.72 : x
2. Step 2: Convert to fraction form
   189,768.96/261,905.40 = 109,170.72/x
3. Step 3: Cross multiply
   189,768.96x = 261,905.40 × 109,170.72
4. Step 4: Simplify right side
   189,768.96x = 28,592,401,089.89
5. Step 5: Solve for x
   x = 28,592,401,089.89/189,768.96
6. Step 6: Final answer
   x = 150,669.54