Finding the Fourth Proportional to 105,481.83, 145,566.29 and 57,734.15

Step by Step Solution

1. Step 1: Write the proportion equation
   105,481.83 : 145,566.29 = 57,734.15 : x
2. Step 2: Convert to fraction form
   105,481.83/145,566.29 = 57,734.15/x
3. Step 3: Cross multiply
   105,481.83x = 145,566.29 × 57,734.15
4. Step 4: Simplify right side
   105,481.83x = 8,404,146,094.74
5. Step 5: Solve for x
   x = 8,404,146,094.74/105,481.83
6. Step 6: Final answer
   x = 79,673.88