Finding the Fourth Proportional to 109,638.38, 151,304.61 and 67,188.71

Step by Step Solution

1. Step 1: Write the proportion equation
   109,638.38 : 151,304.61 = 67,188.71 : x
2. Step 2: Convert to fraction form
   109,638.38/151,304.61 = 67,188.71/x
3. Step 3: Cross multiply
   109,638.38x = 151,304.61 × 67,188.71
4. Step 4: Simplify right side
   109,638.38x = 10,165,960,806.43
5. Step 5: Solve for x
   x = 10,165,960,806.43/109,638.38
6. Step 6: Final answer
   x = 92,722.65