Finding the Fourth Proportional to 76,751.18, 105,919.89 and 42,759.64

Step by Step Solution

1. Step 1: Write the proportion equation
   76,751.18 : 105,919.89 = 42,759.64 : x
2. Step 2: Convert to fraction form
   76,751.18/105,919.89 = 42,759.64/x
3. Step 3: Cross multiply
   76,751.18x = 105,919.89 × 42,759.64
4. Step 4: Simplify right side
   76,751.18x = 4,529,096,365.24
5. Step 5: Solve for x
   x = 4,529,096,365.24/76,751.18
6. Step 6: Final answer
   x = 59,010.12