Finding the Fourth Proportional to 76,116.50, 105,042.08 and 42,127.78

Step by Step Solution

1. Step 1: Write the proportion equation
   76,116.50 : 105,042.08 = 42,127.78 : x
2. Step 2: Convert to fraction form
   76,116.50/105,042.08 = 42,127.78/x
3. Step 3: Cross multiply
   76,116.50x = 105,042.08 × 42,127.78
4. Step 4: Simplify right side
   76,116.50x = 4,425,189,636.98
5. Step 5: Solve for x
   x = 4,425,189,636.98/76,116.50
6. Step 6: Final answer
   x = 58,137.06