Finding the Fourth Proportional to 105,460.69, 145,535.52 and 57,714.01

Step by Step Solution

1. Step 1: Write the proportion equation
   105,460.69 : 145,535.52 = 57,714.01 : x
2. Step 2: Convert to fraction form
   105,460.69/145,535.52 = 57,714.01/x
3. Step 3: Cross multiply
   105,460.69x = 145,535.52 × 57,714.01
4. Step 4: Simplify right side
   105,460.69x = 8,399,438,456.64
5. Step 5: Solve for x
   x = 8,399,438,456.64/105,460.69
6. Step 6: Final answer
   x = 79,645.21