Finding the Fourth Proportional to 76,725.57, 105,884.58 and 42,734.07

Step by Step Solution

1. Step 1: Write the proportion equation
   76,725.57 : 105,884.58 = 42,734.07 : x
2. Step 2: Convert to fraction form
   76,725.57/105,884.58 = 42,734.07/x
3. Step 3: Cross multiply
   76,725.57x = 105,884.58 × 42,734.07
4. Step 4: Simplify right side
   76,725.57x = 4,524,879,213.89
5. Step 5: Solve for x
   x = 4,524,879,213.89/76,725.57
6. Step 6: Final answer
   x = 58,974.85