Finding the Fourth Proportional to 105,109.60, 145,051.76 and 57,363.94

Step by Step Solution

1. Step 1: Write the proportion equation
   105,109.60 : 145,051.76 = 57,363.94 : x
2. Step 2: Convert to fraction form
   105,109.60/145,051.76 = 57,363.94/x
3. Step 3: Cross multiply
   105,109.60x = 145,051.76 × 57,363.94
4. Step 4: Simplify right side
   105,109.60x = 8,320,740,457.53
5. Step 5: Solve for x
   x = 8,320,740,457.53/105,109.60
6. Step 6: Final answer
   x = 79,162.52