Finding the Fourth Proportional to 72,308.34, 108,629.01 and 51,300.54

Step by Step Solution

1. Step 1: Write the proportion equation
   72,308.34 : 108,629.01 = 51,300.54 : x
2. Step 2: Convert to fraction form
   72,308.34/108,629.01 = 51,300.54/x
3. Step 3: Cross multiply
   72,308.34x = 108,629.01 × 51,300.54
4. Step 4: Simplify right side
   72,308.34x = 5,572,726,872.67
5. Step 5: Solve for x
   x = 5,572,726,872.67/72,308.34
6. Step 6: Final answer
   x = 77,068.94