Finding the Fourth Proportional to 105,663.98, 145,819.95 and 57,917.27

Step by Step Solution

1. Step 1: Write the proportion equation
   105,663.98 : 145,819.95 = 57,917.27 : x
2. Step 2: Convert to fraction form
   105,663.98/145,819.95 = 57,917.27/x
3. Step 3: Cross multiply
   105,663.98x = 145,819.95 × 57,917.27
4. Step 4: Simplify right side
   105,663.98x = 8,445,493,415.54
5. Step 5: Solve for x
   x = 8,445,493,415.54/105,663.98
6. Step 6: Final answer
   x = 79,927.84