Finding the Fourth Proportional to 172,139,939.82, 258,309,936.59 and 72,422,276.67

Step by Step Solution

1. Step 1: Write the proportion equation
   172,139,939.82 : 258,309,936.59 = 72,422,276.67 : x
2. Step 2: Convert to fraction form
   172,139,939.82/258,309,936.59 = 72,422,276.67/x
3. Step 3: Cross multiply
   172,139,939.82x = 258,309,936.59 × 72,422,276.67
4. Step 4: Simplify right side
   172,139,939.82x = 18,707,393,693,969,028
5. Step 5: Solve for x
   x = 18,707,393,693,969,028/172,139,939.82
6. Step 6: Final answer
   x = 108,675,498.05