Finding the Fourth Proportional to 76,101.86, 105,020.69 and 42,111.78

Step by Step Solution

1. Step 1: Write the proportion equation
   76,101.86 : 105,020.69 = 42,111.78 : x
2. Step 2: Convert to fraction form
   76,101.86/105,020.69 = 42,111.78/x
3. Step 3: Cross multiply
   76,101.86x = 105,020.69 × 42,111.78
4. Step 4: Simplify right side
   76,101.86x = 4,422,608,192.73
5. Step 5: Solve for x
   x = 4,422,608,192.73/76,101.86
6. Step 6: Final answer
   x = 58,114.32