Finding the Fourth Proportional to 76,100.86, 105,019.31 and 42,110.78

Step by Step Solution

1. Step 1: Write the proportion equation
   76,100.86 : 105,019.31 = 42,110.78 : x
2. Step 2: Convert to fraction form
   76,100.86/105,019.31 = 42,110.78/x
3. Step 3: Cross multiply
   76,100.86x = 105,019.31 × 42,110.78
4. Step 4: Simplify right side
   76,100.86x = 4,422,445,059.16
5. Step 5: Solve for x
   x = 4,422,445,059.16/76,100.86
6. Step 6: Final answer
   x = 58,112.94