Finding the Fourth Proportional to 72,308.16, 108,363.76 and 45,965.68

Step by Step Solution

1. Step 1: Write the proportion equation
   72,308.16 : 108,363.76 = 45,965.68 : x
2. Step 2: Convert to fraction form
   72,308.16/108,363.76 = 45,965.68/x
3. Step 3: Cross multiply
   72,308.16x = 108,363.76 × 45,965.68
4. Step 4: Simplify right side
   72,308.16x = 4,981,013,915.76
5. Step 5: Solve for x
   x = 4,981,013,915.76/72,308.16
6. Step 6: Final answer
   x = 68,885.92