Finding the Fourth Proportional to 108,426.86, 162,640.21 and 45,276.72

Step by Step Solution

1. Step 1: Write the proportion equation
   108,426.86 : 162,640.21 = 45,276.72 : x
2. Step 2: Convert to fraction form
   108,426.86/162,640.21 = 45,276.72/x
3. Step 3: Cross multiply
   108,426.86x = 162,640.21 × 45,276.72
4. Step 4: Simplify right side
   108,426.86x = 7,363,815,248.91
5. Step 5: Solve for x
   x = 7,363,815,248.91/108,426.86
6. Step 6: Final answer
   x = 67,915.05