Finding the Fourth Proportional to 105,460.79, 145,535.94 and 57,714.12

Step by Step Solution

1. Step 1: Write the proportion equation
   105,460.79 : 145,535.94 = 57,714.12 : x
2. Step 2: Convert to fraction form
   105,460.79/145,535.94 = 57,714.12/x
3. Step 3: Cross multiply
   105,460.79x = 145,535.94 × 57,714.12
4. Step 4: Simplify right side
   105,460.79x = 8,399,478,705.47
5. Step 5: Solve for x
   x = 8,399,478,705.47/105,460.79
6. Step 6: Final answer
   x = 79,645.52