Finding the Fourth Proportional to 76,102.86, 105,022.07 and 42,112.78

Step by Step Solution

1. Step 1: Write the proportion equation
   76,102.86 : 105,022.07 = 42,112.78 : x
2. Step 2: Convert to fraction form
   76,102.86/105,022.07 = 42,112.78/x
3. Step 3: Cross multiply
   76,102.86x = 105,022.07 × 42,112.78
4. Step 4: Simplify right side
   76,102.86x = 4,422,771,171.78
5. Step 5: Solve for x
   x = 4,422,771,171.78/76,102.86
6. Step 6: Final answer
   x = 58,115.70