Finding the Fourth Proportional to 72,057.29, 107,998.45 and 51,003.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,057.29 : 107,998.45 = 51,003.50 : x
2. Step 2: Convert to fraction form
   72,057.29/107,998.45 = 51,003.50/x
3. Step 3: Cross multiply
   72,057.29x = 107,998.45 × 51,003.50
4. Step 4: Simplify right side
   72,057.29x = 5,508,298,277.07
5. Step 5: Solve for x
   x = 5,508,298,277.07/72,057.29
6. Step 6: Final answer
   x = 76,443.32