Finding the Fourth Proportional to 77,996.15, 107,634.57 and 42,186.05

Step by Step Solution

1. Step 1: Write the proportion equation
   77,996.15 : 107,634.57 = 42,186.05 : x
2. Step 2: Convert to fraction form
   77,996.15/107,634.57 = 42,186.05/x
3. Step 3: Cross multiply
   77,996.15x = 107,634.57 × 42,186.05
4. Step 4: Simplify right side
   77,996.15x = 4,540,676,813.58
5. Step 5: Solve for x
   x = 4,540,676,813.58/77,996.15
6. Step 6: Final answer
   x = 58,216.68